Object sys.DBMS_SQLPA package is invalid.

Hi,

  The current object is invalid.  

   SYS      DBMS_SQLPA      PACKAGE BODY      INVALID


  What is the procedure to make it invalid ?, i been searching the internet and i have found the below procedure to fix it.


drop table plan_table
@?/rdbms/admin/utlxplan.sql
@?/rdbms/admin/prvtspao.plb
@?/rdbms/admin/utlrp.sql

select OWNER,object_name,object_type from dba_objects where object_name='PLAN_TABLE';

SYS      PLAN_TABLE      TABLE
PUBLIC      PLAN_TABLE      SYNONYM
SYSTEM      PLAN_TABLE      TABLE

What would be the table to be dropped ?

Is that the correct way to fix this error ?

Regards,