Currently, typos in the exclusive set can go unnoticed. While they cannot be validated eagerly, the exclusive sets should be linted (with any invalid entries logged as a warning) on post-load.

(I'm just commenting on this btw) I'm wondering if the issues with Apothic Compats (version 0.1.7) might relate to this? ( #6 )
So does this mean that I should just ignore the log spamming from both Apothic Compats and (possibly) Ancient Reforging?
If so then that'll be a good performance hit on my end, I'd rather wait for ianm to update both of those mods with fixes since Apothic Compats spams the log (and the console I presume) which possibly causes performance issues (I've already reported to ianm about that but haven't gotten a response yet).

One more thing, what I find coincidental is you opened this four days before I opened my report on ianm's issue tracker.
Which is why I'm commenting on this with my findings with Apothic Compats because what I see in my log might relate to this.

I don't think this has anything to do with the issue you linked there.