diff --git a/core/group_instant.go b/core/group_instant.go
index af82e01..cb89fde 100644
--- a/core/group_instant.go
+++ b/core/group_instant.go
@@ -323,13 +323,6 @@ func (gi *groupInstant) leave(gd *instantDoc, mid primitive.ObjectID) error {
 
 	gi.rh.JSONDel(mid.Hex(), "$.instant.id")
 
-	// mid한테는 빈 GroupDocFull을 보낸다. 그러면 지워짐
-	gi.sendUpstreamMessage(&wshandler.UpstreamMessage{
-		Target: mid.Hex(),
-		Body:   bson.M{},
-		Tag:    []string{"GroupDocFull", gd.strid()},
-	})
-
 	// gid에는 제거 메시지 보냄
 	gi.sendUpstreamMessage(&wshandler.UpstreamMessage{
 		Target: "#" + gd.strid(),