# A [simulacrum][1], even [_true polymporphed_][2], gets destroyed upon subsequent casting of _simulacrum_

**tl;dr** True polymorph changes a targets form and stat block.  The property of being a simulacrum is not inherent in either of these, so _true polymorph_ does not insulate nor prevent the simulacrum from being destroyed upon a subsequent casting.

## The form of the simulacrum does not affect that it is a simulacrum

It's flexibility with regard to form is already established as it can duplicate any beast or humaniod.  Regardless of form, it's still a simulacrum.

> You shape an illusory duplicate of one beast or humanoid 

## True polymorph for the creature to creature case just changes the form.

> the **new form** can be any kind you choose whose challenge rating is equal to or less than the target's

The target gets the statistics of the new form. 

> The target's game statistics, including mental ability scores, are replaced by the statistics of the new form. It retains its alignment and personality.

## Being a simulacrum isn't a [statistic][3] of the form.  

Being a simulacrum is specified by a magical effect not the stat block of the form it assumes.  So regardless of form or stat block, it's still a simulacrum subject to the effects of the spell that created it including being destroyed upon subsequent casting.


  [1]: https://www.dndbeyond.com/spells/simulacrum
  [2]: https://www.dndbeyond.com/spells/true-polymorph
  [3]: https://www.dndbeyond.com/sources/basic-rules/monsters#MonsterStatistics