ORA-63354
Cannot perform the operation because column name 'string' is a reserved column in a Timehouse enabled table.
Cause
An attempt is being made to perform an operation on a reserved column in a Timehouse enabled table. Reserved columns cannot be added, dropped, modified, or renamed. The list of reserved names is: SYS_STARTTIME, SYS_ENDTIME, SYS_STARTSCN, SYS_ENDSCN, SYS_OPERATION, SYS_XID, VERSIONS_STARTTIME, VERSIONS_ENDTIME, VERSIONS_STARTSCN, VERSIONS_ENDSCN, and VERSIONS_XID.
Action
Retry the operation on a non-reserved column.