diff --git a/openapi/openapiv2.json b/openapi/openapiv2.json
index 0b643ceb7..a793da51c 100644
--- a/openapi/openapiv2.json
+++ b/openapi/openapiv2.json
@@ -22602,6 +22602,10 @@
         "workerVersion": {
           "$ref": "#/definitions/v1WorkerVersionStamp",
           "title": "Version info of the worker who processed this workflow task. If present, the `build_id` field\nwithin is also used as `binary_checksum`, which may be omitted in that case (it may also be\npopulated to preserve compatibility).\nDeprecated. This field should be cleaned up when versioning-2 API is removed. [cleanup-experimental-wv]"
+        },
+        "resetRequestId": {
+          "type": "string",
+          "description": "The request ID of the public ResetWorkflowExecution request that created new_run_id.\nOnly set when cause is WORKFLOW_TASK_FAILED_CAUSE_RESET_WORKFLOW. Used by the server\nto restore reset request deduplication when rebuilding state or replicating history.\nEmpty for internal resets and reset events written before this field was introduced."
         }
       }
     },
diff --git a/openapi/openapiv3.yaml b/openapi/openapiv3.yaml
index 2aa7c45bf..48531b276 100644
--- a/openapi/openapiv3.yaml
+++ b/openapi/openapiv3.yaml
@@ -21236,6 +21236,13 @@ components:
              within is also used as `binary_checksum`, which may be omitted in that case (it may also be
              populated to preserve compatibility).
              Deprecated. This field should be cleaned up when versioning-2 API is removed. [cleanup-experimental-wv]
+        resetRequestId:
+          type: string
+          description: |-
+            The request ID of the public ResetWorkflowExecution request that created new_run_id.
+             Only set when cause is WORKFLOW_TASK_FAILED_CAUSE_RESET_WORKFLOW. Used by the server
+             to restore reset request deduplication when rebuilding state or replicating history.
+             Empty for internal resets and reset events written before this field was introduced.
     WorkflowTaskScheduledEventAttributes:
       type: object
       properties:
diff --git a/temporal/api/history/v1/message.proto b/temporal/api/history/v1/message.proto
index b40324d68..65e69e41d 100644
--- a/temporal/api/history/v1/message.proto
+++ b/temporal/api/history/v1/message.proto
@@ -415,6 +415,11 @@ message WorkflowTaskFailedEventAttributes {
     // populated to preserve compatibility).
     // Deprecated. This field should be cleaned up when versioning-2 API is removed. [cleanup-experimental-wv]
     temporal.api.common.v1.WorkerVersionStamp worker_version = 10 [deprecated = true];
+    // The request ID of the public ResetWorkflowExecution request that created new_run_id.
+    // Only set when cause is WORKFLOW_TASK_FAILED_CAUSE_RESET_WORKFLOW. Used by the server
+    // to restore reset request deduplication when rebuilding state or replicating history.
+    // Empty for internal resets and reset events written before this field was introduced.
+    string reset_request_id = 11;
 }
 
 message ActivityTaskScheduledEventAttributes {