HI Mandeep,
Please use below command to unlock sap* and try again .cross check you schema and replcae SAPSR3 in below command
SQL> update SAPSR3.USR02 set uflag=0 where BNAME='SAP*' and MANDT='006';
You should get output as 1 row updated ,after this commit .If user doesnt exist then 0 rows updated
SQL> commit;
Commit complete.
Regards,
Murali