ORA-00600: code erreur interne, arguments : [kposcws0], [], [], [], [], [], [], []

hello all, for several days I have errors in my alerts and trace files.

Here below the part of the files.it  is a production base in the 9i and we do not yet have a migration project. can you help me to fix these errors?

----------------------------------------------------trace---------------------------------------------------------------------------------

ksedmp: internal or fatal error

ORA-00600: code erreur interne, arguments : [kposcws0], [], [], [], [], [], [], []

Current SQL statement for this session:

select ope, eve, dat, lib, val, mondeb, moncre, solint, rang from   tt16262589_tmp1_liste where rang <= '  4618' order by rang

----- Call Stack Trace -----

calling              call     entry                argument values in hex      

location             type     point                (? means dubious value)