diff --git a/db_scripts/diff/15393.down b/db_scripts/diff/15393.down
new file mode 100644
index 00000000..f5467062
--- /dev/null
+++ b/db_scripts/diff/15393.down
@@ -0,0 +1,3 @@
+USE prosody;
+
+ALTER TABLE sipwise_mam DROP KEY `with_idx`;
diff --git a/db_scripts/diff/15393.up b/db_scripts/diff/15393.up
new file mode 100644
index 00000000..88192906
--- /dev/null
+++ b/db_scripts/diff/15393.up
@@ -0,0 +1,3 @@
+USE prosody;
+
+ALTER TABLE sipwise_mam ADD KEY `with_idx` (`with`);