ORA-28007: the password cannot be reused

Scenario:

Trying to reset to the existing password throws following error.

ERROR at line 1:
ORA-28007: the password cannot be reused

Solution:

Check the user profile set for the user. Check for the existence of a password verify function in the profile.

Set the password_verify_function to NULL

Another reason could be that the PASSWORD_REUSE_MAX limit has reached. If so set to a higher value or to UNLIMITED and reset the password as shown below.

SQL> alter profile default limit PASSWORD_REUSE_MAX unlimited;

SQL> alter user USERNAME identified by <PREV_PWD>;