Oracle Error ORA-14626: values being added already exist in DEFAULT subpartition

Oracle Error Message

ORA-14626: values being added already exist in DEFAULT subpartition

Reason for the Error

An ADD VALUE operation cannot be executed because the values being added exist in the DEFAULT subpartition

Solution

Issue a SPLIT of the DEFAULT subpartition and then MERGE the split subpartition into the subpartition to which values need to be added