diff --git a/db_scripts/diff/15689.down b/db_scripts/diff/15689.down
new file mode 100644
index 00000000..a1a008dd
--- /dev/null
+++ b/db_scripts/diff/15689.down
@@ -0,0 +1,7 @@
+use kamailio;
+ALTER TABLE kamailio.sems_registrations
+  DROP PRIMARY KEY,
+  MODIFY `subscriber_id` int(11) NOT NULL,
+  ADD PRIMARY KEY (`subscriber_id`),
+  DROP COLUMN `id`,
+  DROP COLUMN `peer_host_id`;
diff --git a/db_scripts/diff/15689.up b/db_scripts/diff/15689.up
new file mode 100644
index 00000000..9633784d
--- /dev/null
+++ b/db_scripts/diff/15689.up
@@ -0,0 +1,6 @@
+use kamailio;
+ALTER TABLE kamailio.sems_registrations
+  DROP PRIMARY KEY,
+  ADD COLUMN `id` INT UNSIGNED PRIMARY KEY AUTO_INCREMENT,
+  ADD COLUMN `peer_host_id` int(10) UNSIGNED DEFAULT NULL,
+  MODIFY `subscriber_id` int(10) UNSIGNED DEFAULT NULL;