ORA-28014: cannot drop administrative users

Error

In Oracle 12c, when i tried to drop the user present in container database which having data of my application for IMPDP the same user then i got the following error with DROP command:


SQL> drop user hr01;
drop user hr01
*
ERROR at line 1:
ORA-28014: cannot drop administrative users


Solution
For dropping the user present in Container ROOT, we need to use the hidden parameter “_ORACLE_SCRIPT”.


SQL> alter session set "_oracle_script"=true;
Session altered.

SQL> drop user hr01;
User dropped.