diff --git a/pkg/proto/sdkws/sdkws.proto b/pkg/proto/sdkws/sdkws.proto
index 2e4b2d038..1921614de 100644
--- a/pkg/proto/sdkws/sdkws.proto
+++ b/pkg/proto/sdkws/sdkws.proto
@@ -430,7 +430,6 @@ message RevokeMsgTip{
   int64 sesstionType = 5;
   int64 seq = 6;
   string conversationID = 7;
-  string ex = 8;
 }
 
 ///////////////////signal//////////////