I am not sure why this appears.

[Worker-ResourceReload-11/ERROR][net.minecraft.server.packs.resources.SimpleJsonResourceReloadListener/]: Couldn't parse data file extradatamodels:upgrade_aquatic/jellyfish from extradatamodels:data_models/upgrade_aquatic/jellyfish.json

I do not have mode Upgrade Aquatic in my modpack.
if you want to check that by your self my modpack: grinding and industrialization