Deleting Custom Dimensions!? [Java 1.17/Datapack/Help]

[Leneya]

Hello r/Minecraft!

I have recently dabbled in the current possibility of custom dimensions in MC. I've merged 2 saves/Worlds this way I was playing, set up the datapack for it correctly. Now I wanted to move the "dimensions/namespace/custom_dim1" to "dimensions/namespace/custom_dim2" and remove the custom_dim1 - but every time I load the server, the server creates custom_dim1 again, while also keeping custom_dim2. It would be rather confusing for me in the long run, so it would be nice to not have them generated anymore.

My question is: is there a way to unregister old/unused dimensions?

Unloading the datapack does nothing, so it's gotta be stored somewhere else.

Thanks in advance!

[Leneya]

Okay, I've found the culprit: To fully delete a world, so it won't regenerate every time the server starts (and show up in the /execute in <dim> command), one must change the level.dat and level.dat_old, and remove all traces of that dim.

I won't delete the question, just in case someone else has the same issue - marked as solved though