diff --git a/gensrc/thrift/FrontendService.thrift b/gensrc/thrift/FrontendService.thrift
index 17a3095ead..5d399e2d77 100644
--- a/gensrc/thrift/FrontendService.thrift
+++ b/gensrc/thrift/FrontendService.thrift
@@ -609,7 +609,7 @@ struct TLoadTxnBeginRequest {
     10: optional i64 timeout
     11: optional Types.TUniqueId request_id
     12: optional string token
-    13: optional i64 backend_id
+    15: optional i64 backend_id
 }
 
 struct TLoadTxnBeginResult {