Hi!
When trying this mod on MC 1.17 (with OptiFine and Fabric), I got error saying this mod is incompatible because it's made for older
version. Could you please upgrade this mod to make it working with MC 1.17.x?

Thanks.

You can just ignore that warning, the pack is not affected.
In the next release, I'll update the pack format so the warning doesn't show up anymore.