diff --git a/src/main/resources/sql/v1.22.ddl b/src/main/resources/sql/v1.22.ddl
new file mode 100644
index 0000000..5d1b9bb
--- /dev/null
+++ b/src/main/resources/sql/v1.22.ddl
@@ -0,0 +1,3 @@
+CREATE INDEX IF NOT EXISTS
+    idx_signals_phone_fid_map_calculated_at
+    ON signals_phone_fid_map (calculated_at);
\ No newline at end of file