diff --git a/synapse/storage/schema/delta/50/add_creation_ts_users_index.sql b/synapse/storage/schema/delta/50/add_creation_ts_users_index.sql
index ba33acfd51..c93ae47532 100644
--- a/synapse/storage/schema/delta/50/add_creation_ts_users_index.sql
+++ b/synapse/storage/schema/delta/50/add_creation_ts_users_index.sql
@@ -15,6 +15,5 @@
 
 
 
-CREATE INDEX users_creation_ts ON users(creation_ts);
 INSERT into background_updates (update_name, progress_json)
     VALUES ('users_creation_ts', '{}');