diff --git a/src/main/resources/scripts/V3_3_0_1__add_user_account_name.sql b/src/main/resources/scripts/V3_3_0_1__add_user_account_name.sql
index 0ae164ec..c073a82f 100644
--- a/src/main/resources/scripts/V3_3_0_1__add_user_account_name.sql
+++ b/src/main/resources/scripts/V3_3_0_1__add_user_account_name.sql
@@ -1,7 +1 @@
 ALTER TABLE users ADD COLUMN account_name VARCHAR(63);
-
-UPDATE users SET account_name = SUBSTRING(mail FROM 1 FOR POSITION('@' IN mail) - 1);
-
-ALTER TABLE users ALTER COLUMN account_name SET NOT NULL;
-
-CREATE UNIQUE INDEX users_account_name_index ON users (account_name);
\ No newline at end of file