diff --git a/schema.sql b/schema.sql
index 3556d93..941f7e4 100644
--- a/schema.sql
+++ b/schema.sql
@@ -216,6 +216,7 @@ BEGIN
         SELECT OLD.Id, t.billId
         FROM Transfer t
           JOIN CurrentDebts cd ON t.billId = cd.billId
+        WHERE OLD.Id = t.fromCredit
     ;
 
 END;