fix: refs #6861 deleteAdded

db/routines/vn/procedures/itemShelvingSale_deleteAdded.sql

@@ -22,9 +22,10 @@ proc: BEGIN
 	SELECT iss.saleFk INTO vSaleFk
 		FROM itemShelvingSale iss
 			JOIN sale s ON s.id = iss.saleFk
-		WHERE iss.id = vSelf AND s.isAdded;
+		WHERE iss.id = vSelf AND s.isAdded
+		FOR UPDATE;
 
-	IF vSaleFk IS NULL THEN 
+	IF vSaleFk IS NULL THEN
 		CALL util.throw('The sale can not be deleted');
 	END IF;
 
@@ -32,7 +33,7 @@ proc: BEGIN
 		FROM itemShelvingSale 
 		WHERE saleFk = vSaleFk AND isPicked;
 
-	IF vHasSalesPicked THEN 
+	IF vHasSalesPicked THEN
 		CALL util.throw('A sale with picked sales cannot be deleted');
 	END IF;