diff --git a/core/group_chat.go b/core/group_chat.go
index 5bba109..e50abd2 100644
--- a/core/group_chat.go
+++ b/core/group_chat.go
@@ -163,7 +163,8 @@ func (gc *groupChat) EnterPublicChannel(ctx wshandler.ApiCallContext) {
 					Tag:    []string{"ChattingChannelProperties"},
 				})
 			} else {
-				logger.Println("JSONArrAppend failed :", chanid, err)
+				logger.Println("JSONSet $.members failed :", chanid, err)
+				logger.Println(gc.rh.JSONGet(chanid, "$"))
 			}
 		} else {
 			// 풀방