ORA-01653: unable to extend table SYS.AUD$

No body is able to connect :

ORA-00604: error occurred at recursive SQL level 1
ORA-01653: unable to extend table SYS.AUD$ by 8192 in tablespace SYSTEM
ORA-02002: error while writing to audit trail




server223[/home/oracle]>>sqlplus / as sysdba
SQL> truncate table aud$;

Table truncated.


SQL>