ORA-28228
REPLACE clause not specified when the password was being changed.
Cause
An attempt was made to change the password of a user who had been granted one or more administrative privileges. A user with an administrative privilege (SYSOPER, SYSBACKUP...) must supply both the existing and new passwords.
Action
Provide the original password using the REPLACE clause. ALTER USER user IDENTIFIED BY new REPLACE old; If you don't know your old password anymore, contact your user or security administrator.