"ORA-600 [kdibc3position] when running drop_instance.sql script" (4287358)

I received the following error when running the drop_instance.sql script to remove repository data for a instance no longer monitored

ORA-00600 internal error code, arguments: [kdibc3position],

This is caused by an Oracle bug referenced in the metalink article below:

Reference Metalink:
Subject: ORA-600 [kdibc3position]
Doc ID: Note:139039.1
Type: REFERENCE
Last Revision Date: 09-MAY-2008
Status: PUBLISHED

Try running the script again. If the same error in encountered, contact Oracle and reference Doc ID: Note:139039.1