diff --git a/database/migrations/0011-login_user_backups_plug_holes.ts b/database/migrations/0011-login_user_backups_plug_holes.ts
index c46789cd7..179710869 100644
--- a/database/migrations/0011-login_user_backups_plug_holes.ts
+++ b/database/migrations/0011-login_user_backups_plug_holes.ts
@@ -1,17 +1,13 @@
 /* MIGRATION TO CLEAN PRODUCTION DATA
  *
- * cleanup the login_user_backups table as far a possible.
- * Since the passphrase changed and its type is not detectable
- * this whole thing is a pitfall
+ * cleanup the login_user_backups.
+ * Delete data with no reference in login_users table and
+ * delete the right one of the duplicate keys
  */
 
 export async function upgrade(queryFn: (query: string, values?: any[]) => Promise<Array<any>>) {
   // Delete data with no reference in login_users table
   await queryFn(`DELETE FROM login_user_backups WHERE user_id NOT IN (SELECT id FROM login_users)`)
-  // Searching for users with a missing password and a backup entry
-  // `SELECT * FROM login_user_backups WHERE user_id IN (SELECT id FROM login_users WHERE password = 0)`
-  // results in only new users with the proper passphrase scheme - luckily we seem to be good on this one
-  // 142 entries in total are found and every entry has type 2 (new one).
 
   // Delete duplicates which have changed for some reasons
   await queryFn(`DELETE FROM login_user_backups WHERE id IN (21, 103, 313, 325, 726, 750, 1098)`)