How to fix the Oracle error ORA-31111: table string cannot be hierarchically enabled?

In this post, you’ll learn more about the Oracle ErrorORA-31111: table string cannot be hierarchically enabled with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-31111: table string cannot be hierarchically enabled

Reason for the Error ORA-31111: table string cannot be hierarchically enabled

Trigger _xdb_pitrigger already exists

How to fix the Error ORA-31111: table string cannot be hierarchically enabled ?

You can fix this error in Oracle by following the below steps

Delete all rows in the hierarchical index and then rebuild it.