diff --git a/protos/CommonProto.proto b/protos/CommonProto.proto
index ef9303f..81c1c28 100644
--- a/protos/CommonProto.proto
+++ b/protos/CommonProto.proto
@@ -227,6 +227,7 @@ option optimize_for = SPEED;
 	message GemNew{
 		optional int32 id = 1;
 		repeated Attribute attr = 2;
+		optional int32 isReplace = 3;
 	}
 
 	message Drop{