diff --git a/lib/NGCP/Schema/Result/voip_subscriber_timezone.pm b/lib/NGCP/Schema/Result/voip_subscriber_timezone.pm
index a31af2f4..6683ecd8 100644
--- a/lib/NGCP/Schema/Result/voip_subscriber_timezone.pm
+++ b/lib/NGCP/Schema/Result/voip_subscriber_timezone.pm
@@ -50,13 +50,6 @@ __PACKAGE__->belongs_to(
   { cascade_copy => 0, cascade_delete => 0 },
 );
 
-__PACKAGE__->belongs_to(
-  "contract",
-  "NGCP::Schema::Result::contracts",
-  { id => "contract_id" },
-  { cascade_copy => 0, cascade_delete => 0 },
-);
-
 __PACKAGE__->belongs_to(
   "contact",
   "NGCP::Schema::Result::contacts",