diff --git a/clients/google-api-services-apphub/v1/2.0.0/README.md b/clients/google-api-services-apphub/v1/2.0.0/README.md
index 340abd1273e..52975b14a60 100644
--- a/clients/google-api-services-apphub/v1/2.0.0/README.md
+++ b/clients/google-api-services-apphub/v1/2.0.0/README.md
@@ -22,7 +22,7 @@ Add the following lines to your `pom.xml` file:
     <dependency>
       <groupId>com.google.apis</groupId>
       <artifactId>google-api-services-apphub</artifactId>
-      <version>v1-rev20260422-2.0.0</version>
+      <version>v1-rev20260520-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-apphub:v1-rev20260422-2.0.0'
+  implementation 'com.google.apis:google-api-services-apphub:v1-rev20260520-2.0.0'
 }
 ```
 
diff --git a/clients/google-api-services-apphub/v1/2.0.0/com/google/api/services/apphub/v1/AppHub.java b/clients/google-api-services-apphub/v1/2.0.0/com/google/api/services/apphub/v1/AppHub.java
index f6d6277e9ab..3990c7dbba6 100644
--- a/clients/google-api-services-apphub/v1/2.0.0/com/google/api/services/apphub/v1/AppHub.java
+++ b/clients/google-api-services-apphub/v1/2.0.0/com/google/api/services/apphub/v1/AppHub.java
@@ -1172,7 +1172,7 @@ public UpdateBoundary setRequestId(java.lang.String requestId) {
         }
 
         /**
-         * Required. Field mask is used to specify the fields to be overwritten in the Boundary
+         * Optional. Field mask is used to specify the fields to be overwritten in the Boundary
          * resource by the update. The fields specified in the update_mask are relative to the
          * resource, not the full request. A field will be overwritten if it is in the mask. If the
          * user does not provide a mask then all fields will be overwritten.
@@ -1180,7 +1180,7 @@ public UpdateBoundary setRequestId(java.lang.String requestId) {
         @com.google.api.client.util.Key
         private String updateMask;
 
-        /** Required. Field mask is used to specify the fields to be overwritten in the Boundary resource by
+        /** Optional. Field mask is used to specify the fields to be overwritten in the Boundary resource by
        the update. The fields specified in the update_mask are relative to the resource, not the full
        request. A field will be overwritten if it is in the mask. If the user does not provide a mask then
        all fields will be overwritten.
@@ -1190,7 +1190,7 @@ public String getUpdateMask() {
         }
 
         /**
-         * Required. Field mask is used to specify the fields to be overwritten in the Boundary
+         * Optional. Field mask is used to specify the fields to be overwritten in the Boundary
          * resource by the update. The fields specified in the update_mask are relative to the
          * resource, not the full request. A field will be overwritten if it is in the mask. If the
          * user does not provide a mask then all fields will be overwritten.
@@ -2354,7 +2354,7 @@ public Patch setRequestId(java.lang.String requestId) {
           }
 
           /**
-           * Required. Field mask is used to specify the fields to be overwritten in the Application
+           * Optional. Field mask is used to specify the fields to be overwritten in the Application
            * resource by the update. The fields specified in the update_mask are relative to the
            * resource, not the full request. The API changes the values of the fields as specified
            * in the update_mask. The API ignores the values of all fields not covered by the
@@ -2364,7 +2364,7 @@ public Patch setRequestId(java.lang.String requestId) {
           @com.google.api.client.util.Key
           private String updateMask;
 
-          /** Required. Field mask is used to specify the fields to be overwritten in the Application resource by
+          /** Optional. Field mask is used to specify the fields to be overwritten in the Application resource by
          the update. The fields specified in the update_mask are relative to the resource, not the full
          request. The API changes the values of the fields as specified in the update_mask. The API ignores
          the values of all fields not covered by the update_mask. You can also unset a field by not
@@ -2376,7 +2376,7 @@ public String getUpdateMask() {
           }
 
           /**
-           * Required. Field mask is used to specify the fields to be overwritten in the Application
+           * Optional. Field mask is used to specify the fields to be overwritten in the Application
            * resource by the update. The fields specified in the update_mask are relative to the
            * resource, not the full request. The API changes the values of the fields as specified
            * in the update_mask. The API ignores the values of all fields not covered by the
@@ -3648,7 +3648,7 @@ public Patch setRequestId(java.lang.String requestId) {
             }
 
             /**
-             * Required. Field mask is used to specify the fields to be overwritten in the Service
+             * Optional. Field mask is used to specify the fields to be overwritten in the Service
              * resource by the update. The fields specified in the update_mask are relative to the
              * resource, not the full request. The API changes the values of the fields as specified
              * in the update_mask. The API ignores the values of all fields not covered by the
@@ -3659,7 +3659,7 @@ public Patch setRequestId(java.lang.String requestId) {
             @com.google.api.client.util.Key
             private String updateMask;
 
-            /** Required. Field mask is used to specify the fields to be overwritten in the Service resource by the
+            /** Optional. Field mask is used to specify the fields to be overwritten in the Service resource by the
            update. The fields specified in the update_mask are relative to the resource, not the full request.
            The API changes the values of the fields as specified in the update_mask. The API ignores the
            values of all fields not covered by the update_mask. You can also unset a field by not specifying
@@ -3671,7 +3671,7 @@ public String getUpdateMask() {
             }
 
             /**
-             * Required. Field mask is used to specify the fields to be overwritten in the Service
+             * Optional. Field mask is used to specify the fields to be overwritten in the Service
              * resource by the update. The fields specified in the update_mask are relative to the
              * resource, not the full request. The API changes the values of the fields as specified
              * in the update_mask. The API ignores the values of all fields not covered by the
@@ -4645,7 +4645,7 @@ public Patch setRequestId(java.lang.String requestId) {
             }
 
             /**
-             * Required. Field mask is used to specify the fields to be overwritten in the Workload
+             * Optional. Field mask is used to specify the fields to be overwritten in the Workload
              * resource by the update. The fields specified in the update_mask are relative to the
              * resource, not the full request. The API changes the values of the fields as specified
              * in the update_mask. The API ignores the values of all fields not covered by the
@@ -4656,7 +4656,7 @@ public Patch setRequestId(java.lang.String requestId) {
             @com.google.api.client.util.Key
             private String updateMask;
 
-            /** Required. Field mask is used to specify the fields to be overwritten in the Workload resource by
+            /** Optional. Field mask is used to specify the fields to be overwritten in the Workload resource by
            the update. The fields specified in the update_mask are relative to the resource, not the full
            request. The API changes the values of the fields as specified in the update_mask. The API ignores
            the values of all fields not covered by the update_mask. You can also unset a field by not
@@ -4668,7 +4668,7 @@ public String getUpdateMask() {
             }
 
             /**
-             * Required. Field mask is used to specify the fields to be overwritten in the Workload
+             * Optional. Field mask is used to specify the fields to be overwritten in the Workload
              * resource by the update. The fields specified in the update_mask are relative to the
              * resource, not the full request. The API changes the values of the fields as specified
              * in the update_mask. The API ignores the values of all fields not covered by the
diff --git a/clients/google-api-services-apphub/v1/2.0.0/pom.xml b/clients/google-api-services-apphub/v1/2.0.0/pom.xml
index 1d62bc6428e..346b667c811 100644
--- a/clients/google-api-services-apphub/v1/2.0.0/pom.xml
+++ b/clients/google-api-services-apphub/v1/2.0.0/pom.xml
@@ -8,8 +8,8 @@
 
   <groupId>com.google.apis</groupId>
   <artifactId>google-api-services-apphub</artifactId>
-  <version>v1-rev20260422-2.0.0</version>
-  <name>App Hub API v1-rev20260422-2.0.0</name>
+  <version>v1-rev20260520-2.0.0</version>
+  <name>App Hub API v1-rev20260520-2.0.0</name>
   <packaging>jar</packaging>
 
   <inceptionYear>2011</inceptionYear>
diff --git a/clients/google-api-services-apphub/v1/README.md b/clients/google-api-services-apphub/v1/README.md
index 340abd1273e..52975b14a60 100644
--- a/clients/google-api-services-apphub/v1/README.md
+++ b/clients/google-api-services-apphub/v1/README.md
@@ -22,7 +22,7 @@ Add the following lines to your `pom.xml` file:
     <dependency>
       <groupId>com.google.apis</groupId>
       <artifactId>google-api-services-apphub</artifactId>
-      <version>v1-rev20260422-2.0.0</version>
+      <version>v1-rev20260520-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-apphub:v1-rev20260422-2.0.0'
+  implementation 'com.google.apis:google-api-services-apphub:v1-rev20260520-2.0.0'
 }
 ```
 
diff --git a/clients/google-api-services-apphub/v1alpha/2.0.0/README.md b/clients/google-api-services-apphub/v1alpha/2.0.0/README.md
index 55a45720cf8..8ee91907bea 100644
--- a/clients/google-api-services-apphub/v1alpha/2.0.0/README.md
+++ b/clients/google-api-services-apphub/v1alpha/2.0.0/README.md
@@ -22,7 +22,7 @@ Add the following lines to your `pom.xml` file:
     <dependency>
       <groupId>com.google.apis</groupId>
       <artifactId>google-api-services-apphub</artifactId>
-      <version>v1alpha-rev20260422-2.0.0</version>
+      <version>v1alpha-rev20260520-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-apphub:v1alpha-rev20260422-2.0.0'
+  implementation 'com.google.apis:google-api-services-apphub:v1alpha-rev20260520-2.0.0'
 }
 ```
 
diff --git a/clients/google-api-services-apphub/v1alpha/2.0.0/com/google/api/services/apphub/v1alpha/AppHub.java b/clients/google-api-services-apphub/v1alpha/2.0.0/com/google/api/services/apphub/v1alpha/AppHub.java
index 212e6825112..e0c23310c1e 100644
--- a/clients/google-api-services-apphub/v1alpha/2.0.0/com/google/api/services/apphub/v1alpha/AppHub.java
+++ b/clients/google-api-services-apphub/v1alpha/2.0.0/com/google/api/services/apphub/v1alpha/AppHub.java
@@ -1172,7 +1172,7 @@ public UpdateBoundary setRequestId(java.lang.String requestId) {
         }
 
         /**
-         * Required. Field mask is used to specify the fields to be overwritten in the Boundary
+         * Optional. Field mask is used to specify the fields to be overwritten in the Boundary
          * resource by the update. The fields specified in the update_mask are relative to the
          * resource, not the full request. A field will be overwritten if it is in the mask. If the
          * user does not provide a mask then all fields will be overwritten.
@@ -1180,7 +1180,7 @@ public UpdateBoundary setRequestId(java.lang.String requestId) {
         @com.google.api.client.util.Key
         private String updateMask;
 
-        /** Required. Field mask is used to specify the fields to be overwritten in the Boundary resource by
+        /** Optional. Field mask is used to specify the fields to be overwritten in the Boundary resource by
        the update. The fields specified in the update_mask are relative to the resource, not the full
        request. A field will be overwritten if it is in the mask. If the user does not provide a mask then
        all fields will be overwritten.
@@ -1190,7 +1190,7 @@ public String getUpdateMask() {
         }
 
         /**
-         * Required. Field mask is used to specify the fields to be overwritten in the Boundary
+         * Optional. Field mask is used to specify the fields to be overwritten in the Boundary
          * resource by the update. The fields specified in the update_mask are relative to the
          * resource, not the full request. A field will be overwritten if it is in the mask. If the
          * user does not provide a mask then all fields will be overwritten.
@@ -2354,7 +2354,7 @@ public Patch setRequestId(java.lang.String requestId) {
           }
 
           /**
-           * Required. Field mask is used to specify the fields to be overwritten in the Application
+           * Optional. Field mask is used to specify the fields to be overwritten in the Application
            * resource by the update. The fields specified in the update_mask are relative to the
            * resource, not the full request. The API changes the values of the fields as specified
            * in the update_mask. The API ignores the values of all fields not covered by the
@@ -2364,7 +2364,7 @@ public Patch setRequestId(java.lang.String requestId) {
           @com.google.api.client.util.Key
           private String updateMask;
 
-          /** Required. Field mask is used to specify the fields to be overwritten in the Application resource by
+          /** Optional. Field mask is used to specify the fields to be overwritten in the Application resource by
          the update. The fields specified in the update_mask are relative to the resource, not the full
          request. The API changes the values of the fields as specified in the update_mask. The API ignores
          the values of all fields not covered by the update_mask. You can also unset a field by not
@@ -2376,7 +2376,7 @@ public String getUpdateMask() {
           }
 
           /**
-           * Required. Field mask is used to specify the fields to be overwritten in the Application
+           * Optional. Field mask is used to specify the fields to be overwritten in the Application
            * resource by the update. The fields specified in the update_mask are relative to the
            * resource, not the full request. The API changes the values of the fields as specified
            * in the update_mask. The API ignores the values of all fields not covered by the
@@ -3648,7 +3648,7 @@ public Patch setRequestId(java.lang.String requestId) {
             }
 
             /**
-             * Required. Field mask is used to specify the fields to be overwritten in the Service
+             * Optional. Field mask is used to specify the fields to be overwritten in the Service
              * resource by the update. The fields specified in the update_mask are relative to the
              * resource, not the full request. The API changes the values of the fields as specified
              * in the update_mask. The API ignores the values of all fields not covered by the
@@ -3659,7 +3659,7 @@ public Patch setRequestId(java.lang.String requestId) {
             @com.google.api.client.util.Key
             private String updateMask;
 
-            /** Required. Field mask is used to specify the fields to be overwritten in the Service resource by the
+            /** Optional. Field mask is used to specify the fields to be overwritten in the Service resource by the
            update. The fields specified in the update_mask are relative to the resource, not the full request.
            The API changes the values of the fields as specified in the update_mask. The API ignores the
            values of all fields not covered by the update_mask. You can also unset a field by not specifying
@@ -3671,7 +3671,7 @@ public String getUpdateMask() {
             }
 
             /**
-             * Required. Field mask is used to specify the fields to be overwritten in the Service
+             * Optional. Field mask is used to specify the fields to be overwritten in the Service
              * resource by the update. The fields specified in the update_mask are relative to the
              * resource, not the full request. The API changes the values of the fields as specified
              * in the update_mask. The API ignores the values of all fields not covered by the
@@ -4645,7 +4645,7 @@ public Patch setRequestId(java.lang.String requestId) {
             }
 
             /**
-             * Required. Field mask is used to specify the fields to be overwritten in the Workload
+             * Optional. Field mask is used to specify the fields to be overwritten in the Workload
              * resource by the update. The fields specified in the update_mask are relative to the
              * resource, not the full request. The API changes the values of the fields as specified
              * in the update_mask. The API ignores the values of all fields not covered by the
@@ -4656,7 +4656,7 @@ public Patch setRequestId(java.lang.String requestId) {
             @com.google.api.client.util.Key
             private String updateMask;
 
-            /** Required. Field mask is used to specify the fields to be overwritten in the Workload resource by
+            /** Optional. Field mask is used to specify the fields to be overwritten in the Workload resource by
            the update. The fields specified in the update_mask are relative to the resource, not the full
            request. The API changes the values of the fields as specified in the update_mask. The API ignores
            the values of all fields not covered by the update_mask. You can also unset a field by not
@@ -4668,7 +4668,7 @@ public String getUpdateMask() {
             }
 
             /**
-             * Required. Field mask is used to specify the fields to be overwritten in the Workload
+             * Optional. Field mask is used to specify the fields to be overwritten in the Workload
              * resource by the update. The fields specified in the update_mask are relative to the
              * resource, not the full request. The API changes the values of the fields as specified
              * in the update_mask. The API ignores the values of all fields not covered by the
diff --git a/clients/google-api-services-apphub/v1alpha/2.0.0/pom.xml b/clients/google-api-services-apphub/v1alpha/2.0.0/pom.xml
index 3fb0d868fcb..ff29701524c 100644
--- a/clients/google-api-services-apphub/v1alpha/2.0.0/pom.xml
+++ b/clients/google-api-services-apphub/v1alpha/2.0.0/pom.xml
@@ -8,8 +8,8 @@
 
   <groupId>com.google.apis</groupId>
   <artifactId>google-api-services-apphub</artifactId>
-  <version>v1alpha-rev20260422-2.0.0</version>
-  <name>App Hub API v1alpha-rev20260422-2.0.0</name>
+  <version>v1alpha-rev20260520-2.0.0</version>
+  <name>App Hub API v1alpha-rev20260520-2.0.0</name>
   <packaging>jar</packaging>
 
   <inceptionYear>2011</inceptionYear>
diff --git a/clients/google-api-services-apphub/v1alpha/README.md b/clients/google-api-services-apphub/v1alpha/README.md
index 55a45720cf8..8ee91907bea 100644
--- a/clients/google-api-services-apphub/v1alpha/README.md
+++ b/clients/google-api-services-apphub/v1alpha/README.md
@@ -22,7 +22,7 @@ Add the following lines to your `pom.xml` file:
     <dependency>
       <groupId>com.google.apis</groupId>
       <artifactId>google-api-services-apphub</artifactId>
-      <version>v1alpha-rev20260422-2.0.0</version>
+      <version>v1alpha-rev20260520-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-apphub:v1alpha-rev20260422-2.0.0'
+  implementation 'com.google.apis:google-api-services-apphub:v1alpha-rev20260520-2.0.0'
 }
 ```