diff --git a/packages/google-cloud-tasks/protos/protos.d.ts b/packages/google-cloud-tasks/protos/protos.d.ts
index 6045f079e20..e0ee217dd79 100644
--- a/packages/google-cloud-tasks/protos/protos.d.ts
+++ b/packages/google-cloud-tasks/protos/protos.d.ts
@@ -10606,7 +10606,8 @@ export namespace google {
             REQUIRED = 2,
             OUTPUT_ONLY = 3,
             INPUT_ONLY = 4,
-            IMMUTABLE = 5
+            IMMUTABLE = 5,
+            UNORDERED_LIST = 6
         }
 
         /** Properties of a ResourceDescriptor. */
diff --git a/packages/google-cloud-tasks/protos/protos.js b/packages/google-cloud-tasks/protos/protos.js
index bfb54bfd9ed..fbf7f2ed5af 100644
--- a/packages/google-cloud-tasks/protos/protos.js
+++ b/packages/google-cloud-tasks/protos/protos.js
@@ -25174,6 +25174,7 @@
              * @property {number} OUTPUT_ONLY=3 OUTPUT_ONLY value
              * @property {number} INPUT_ONLY=4 INPUT_ONLY value
              * @property {number} IMMUTABLE=5 IMMUTABLE value
+             * @property {number} UNORDERED_LIST=6 UNORDERED_LIST value
              */
             api.FieldBehavior = (function() {
                 var valuesById = {}, values = Object.create(valuesById);
@@ -25183,6 +25184,7 @@
                 values[valuesById[3] = "OUTPUT_ONLY"] = 3;
                 values[valuesById[4] = "INPUT_ONLY"] = 4;
                 values[valuesById[5] = "IMMUTABLE"] = 5;
+                values[valuesById[6] = "UNORDERED_LIST"] = 6;
                 return values;
             })();
     
@@ -31350,6 +31352,7 @@
                             case 3:
                             case 4:
                             case 5:
+                            case 6:
                                 break;
                             }
                     }
@@ -31450,6 +31453,10 @@
                             case 5:
                                 message[".google.api.fieldBehavior"][i] = 5;
                                 break;
+                            case "UNORDERED_LIST":
+                            case 6:
+                                message[".google.api.fieldBehavior"][i] = 6;
+                                break;
                             }
                     }
                     if (object[".google.api.resourceReference"] != null) {
diff --git a/packages/google-cloud-tasks/protos/protos.json b/packages/google-cloud-tasks/protos/protos.json
index b3cd9d4b401..e5c54bab235 100644
--- a/packages/google-cloud-tasks/protos/protos.json
+++ b/packages/google-cloud-tasks/protos/protos.json
@@ -3078,7 +3078,8 @@
                 "REQUIRED": 2,
                 "OUTPUT_ONLY": 3,
                 "INPUT_ONLY": 4,
-                "IMMUTABLE": 5
+                "IMMUTABLE": 5,
+                "UNORDERED_LIST": 6
               }
             },
             "resourceReference": {
diff --git a/packages/google-cloud-tasks/synth.metadata b/packages/google-cloud-tasks/synth.metadata
index 70673374b02..5a7672f9ac3 100644
--- a/packages/google-cloud-tasks/synth.metadata
+++ b/packages/google-cloud-tasks/synth.metadata
@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/nodejs-tasks.git",
-        "sha": "b594ebf0e52e7bc79b95e1dfeac34bfe8fe9713e"
+        "sha": "390ec1f24b8a532482ad704fb870d0d245c3f323"
       }
     },
     {