ORA-00600 [kqlidchg0] | ORA-00001: unique constraint (SYS.I_PLSCOPE_SIG_IDENTIFIER$) violated

Recently after upgrading the dev database to 12c, I ran utlrp to compile the invalid objects and it failed with the below error SQL> @utlrp SQL> SELECT dbms_registry_sys.time_stamp('utlrp_bgn') as timestamp from dual; TIMESTAMP -------------------------------------------------------------------------------- COMP_TIMESTAMP UTLRP_BGN 2015-06-30 03:50:27 SQL> DECLARE 2 threads pls_integer := &&1; 3 BEGIN 4 utl_recomp.recomp_parallel(threads); 5 END; 6 / DECLARE * …