diff --git a/src/main/java/itn/let/mjo/msgdata/service/impl/MjonMsgDataServiceImpl.java b/src/main/java/itn/let/mjo/msgdata/service/impl/MjonMsgDataServiceImpl.java
index 257cc150..dfe9f178 100644
--- a/src/main/java/itn/let/mjo/msgdata/service/impl/MjonMsgDataServiceImpl.java
+++ b/src/main/java/itn/let/mjo/msgdata/service/impl/MjonMsgDataServiceImpl.java
@@ -2604,7 +2604,7 @@ public class MjonMsgDataServiceImpl extends EgovAbstractServiceImpl implements M
     	System.out.println(userLastIdgen);
     	
     	//기존에 등록된 pk값이 없으면 초기 번호로 셋팅
-    	if(userLastIdgen == null) {
+    	if(userLastIdgen == null || userLastIdgen.equals("null")) {
     		
     		userLastIdgen = subUserId + "_00000000000000";