Okay so I have a series of ghosts that cannot be aquired. I mean it too! Can you add a command to remove ghosts in x amount of time? Maybe add an admin cleanup command?

Added 2 minutes delay before they despawn. Although morphs can be spawned with LifeTime:-1 which will make it not despawnable.

Am I able to change the time length via config?

Ah, damn, it would've be nice if you could say it earlier 😂
I'll add it to the ToDo list.

Morphs not vanish (i.e. it's not a bug). However, yeah, it's a good idea to add a feature to allow morphs to decay (like items).

Meanwhile, you can kill those morphs using this command:

/kill @e[type=metamorph:morph]

That will kill all ghosts. If you wish to remove only nearby morphs, include radius condition (i.e. r=10 as in @e[type=metamorph:morph,r=10]).

@mchorse thanks for the quick response I thought it was a bug my bad XD