diff --git a/db_scripts/diff/15092.down b/db_scripts/diff/15092.down
new file mode 100644
index 00000000..32837009
--- /dev/null
+++ b/db_scripts/diff/15092.down
@@ -0,0 +1,3 @@
+USE billing;
+alter table contract_balances drop foreign key `cb_invoiceid_ref`;
+alter table contract_balances add CONSTRAINT cb_invoiceid_ref FOREIGN KEY (`invoice_id`) REFERENCES `invoices` (`id`) on delete CASCADE ON UPDATE CASCADE;
diff --git a/db_scripts/diff/15092.up b/db_scripts/diff/15092.up
new file mode 100644
index 00000000..575321d2
--- /dev/null
+++ b/db_scripts/diff/15092.up
@@ -0,0 +1,3 @@
+USE billing;
+alter table contract_balances drop foreign key `cb_invoiceid_ref`;
+alter table contract_balances add CONSTRAINT cb_invoiceid_ref FOREIGN KEY (`invoice_id`) REFERENCES `invoices` (`id`) on delete set null ON UPDATE CASCADE;
\ No newline at end of file