So my creatures got deleted

I am on a non-dedicated server. I had mods installed like the Christmas Event pack, etc.

I needed to update my installed mods.

I hit update all mods

I waited for the updates to finish

I loaded in and lots of my creatures were gone.

I quit out, and looked to make sure every mod was activated. I then checked the mod store to see if I missed something.

All mods were invalid, not installed properly, etc.

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What caused this issue? I watched as they all updated properly the first time (successfully updated prompt).