In that case update or delete the SAP* user for the client 210 and login with the default password as suggested above.
If you have an Oracle database then update this way.
update <SCHEMA>.USR02 set BNAME='SAP*R' where BNAME='SAP*' and MANDT=210;
commit;
Once you are logged in to the SAP system reset the password of the personal user and then rename the SAP* user back.
update SCHEMA.USR02 set BNAME='SAP*' where BNAME='SAP*'R and MANDT=210;
commit;
Note: Replace SCHEMA with the correct schema name. Eg: SAPSR3 or SAPR3
Regards
RB