Index: trunk/ippTools/src/pstamptool.c
===================================================================
--- trunk/ippTools/src/pstamptool.c	(revision 35673)
+++ trunk/ippTools/src/pstamptool.c	(revision 35955)
@@ -1428,5 +1428,5 @@
     psFree(where);
 
-    psStringAppend(&query, " ORDER BY priority DESC, req_id, dep_id");
+    psStringAppend(&query, " GROUP BY dep_id ORDER BY priority DESC, MIN(req_id), dep_id");
 
     // treat limit == 0 as "no limit"