diff --git a/src/main/java/com/eactive/ext/kjb/ums/KjbUmsService.java b/src/main/java/com/eactive/ext/kjb/ums/KjbUmsService.java
index 659e73b..f54db35 100644
--- a/src/main/java/com/eactive/ext/kjb/ums/KjbUmsService.java
+++ b/src/main/java/com/eactive/ext/kjb/ums/KjbUmsService.java
@@ -112,7 +112,7 @@ public class KjbUmsService {
         }
 
         if (StringUtils.isEmpty(guid)) {
-            guid = String.format("OBP-%s", DateTimeFormatter.ofPattern("yyyyMMddHHmmssSSS").format(LocalDateTime.now()));
+            guid = String.format("APM-%s", DateTimeFormatter.ofPattern("yyyyMMddHHmmssSSS").format(LocalDateTime.now()));
         }
 
         UmsRequestPayload payload = UmsRequestPayload.builder()