If you pull em1 and add a new card in its place does it come up as em1 (incorrect) or em2? Am I misreading, or do you mean to say that if you replace a failed

If you pull em1 and add a new card in its place does it come up as em1 (incorrect) or em2? Am I misreading, or do you mean to say that if you replace a failed part, the ‘correct’ thing is for the replacement to come up with a different name so that the box stays out of production until someone can manually reconfigure it?