feat: ref#7902 Triggers vn.ticketRefund to control deleted tickets

db/routines/vn/procedures/ticketRefund_upsert.sql

@@ -13,9 +13,10 @@ BEGIN
  */
 	DECLARE vIsDeleted BOOL;
 	
-	SELECT SUM(ABS(isDeleted)) INTO vIsDeleted
+	SELECT COUNT(*) INTO vIsDeleted
 		FROM ticket 
-		WHERE id IN (vRefundTicketFk, vOriginalTicketFk);
+		WHERE id IN (vRefundTicketFk, vOriginalTicketFk)
+			AND isDeleted;
 
 	IF vIsDeleted THEN 
 		CALL util.throw('The refund ticket can not be deleted tickets');