Oracle® Database 11g / 12c / 18c error codes ORA-00056: DDL lock on object '[string].[string]' is already held in an incompatible mode

ORA-00056: DDL lock on object '[string].[string]' is already held in an incompatible mode

Oracle Error Code: ORA-00056

Cause: An attempt was made to acquire a DDL lock that is already locked.

Action: This happens if you attempt to drop a table that has parse locks on it.