diff --git a/discovery/workflowexecutions-v1.json b/discovery/workflowexecutions-v1.json
index b0450bc486..3ef4fd20ec 100644
--- a/discovery/workflowexecutions-v1.json
+++ b/discovery/workflowexecutions-v1.json
@@ -517,7 +517,7 @@
       }
     }
   },
-  "revision": "20240916",
+  "revision": "20241001",
   "rootUrl": "https://workflowexecutions.googleapis.com/",
   "schemas": {
     "Callback": {
@@ -1105,7 +1105,7 @@
           "type": "string"
         },
         "progressNumber": {
-          "description": "Progress number represents the current state of the current progress. eg: A step entry represents the 4th iteration in a progress of PROGRESS_TYPE_FOR.",
+          "description": "Progress number represents the current state of the current progress. eg: A step entry represents the 4th iteration in a progress of PROGRESS_TYPE_FOR. Note: This field is only populated when an iteration exists and the starting value is 1.",
           "format": "int64",
           "type": "string"
         },
diff --git a/src/apis/workflowexecutions/v1.ts b/src/apis/workflowexecutions/v1.ts
index 9d3e76c010..c6384461a8 100644
--- a/src/apis/workflowexecutions/v1.ts
+++ b/src/apis/workflowexecutions/v1.ts
@@ -490,7 +490,7 @@ export namespace workflowexecutions_v1 {
      */
     expectedIteration?: string | null;
     /**
-     * Progress number represents the current state of the current progress. eg: A step entry represents the 4th iteration in a progress of PROGRESS_TYPE_FOR.
+     * Progress number represents the current state of the current progress. eg: A step entry represents the 4th iteration in a progress of PROGRESS_TYPE_FOR. Note: This field is only populated when an iteration exists and the starting value is 1.
      */
     progressNumber?: string | null;
     /**