diff --git a/db_scripts/diff/15020.down b/db_scripts/diff/15020.down
new file mode 100644
index 00000000..8fc7d99b
--- /dev/null
+++ b/db_scripts/diff/15020.down
@@ -0,0 +1,5 @@
+USE provisioning;
+
+ALTER TABLE voip_sound_sets 
+  DROP COLUMN contract_id;
+
diff --git a/db_scripts/diff/15020.up b/db_scripts/diff/15020.up
new file mode 100644
index 00000000..5b1ea38e
--- /dev/null
+++ b/db_scripts/diff/15020.up
@@ -0,0 +1,6 @@
+USE provisioning;
+
+ALTER TABLE voip_sound_sets 
+  ADD COLUMN contract_id INT(11) UNSIGNED DEFAULT NULL, 
+  ADD KEY contract_id_idx(contract_id);
+