Oracle Message ORA-38906 - insert into DML Error Logging table string failed

ERRORinsert into DML Error Logging table string failed
CAUSEAn error occurred when attempting to log a DML Error on behalf of the DML Error logging clause. This may be intended if a trigger is defined on the error table (which in turn errors out in certain cases).
ACTIONDetermine root cause of error (in error stack).