diff --git a/data/ddl/package/UNICAEN_TBL/body.sql b/data/ddl/package/UNICAEN_TBL/body.sql
index 3f3c18e4fe17313714fd7d6078d29998a510b5a2..3b9397f9c2642590b160ff8911ef18a65dc3bc51 100644
--- a/data/ddl/package/UNICAEN_TBL/body.sql
+++ b/data/ddl/package/UNICAEN_TBL/body.sql
@@ -117,7 +117,9 @@ CREATE OR REPLACE PACKAGE BODY "UNICAEN_TBL" AS
 
   PROCEDURE ANNULER_DEMANDES(TBL_NAME VARCHAR2) IS
   BEGIN
-    dems(tbl_name).delete;
+    IF dems.exists(tbl_name) THEN
+      dems(tbl_name).delete;
+    END IF;
   END;