Atrtibute drops below equipped item requirement

I’m SURE this has been asked before, but for the life of me, nothing comes up on Google or other searches, so please forgive me for asking a simple (I thought) question.

If you have an item equipped, and you drop below the requisite attribute requirement (like, you swap an item that gave you attribute points), it turns red but remains equipped. What is the effect of that?

Thanks!

The item for all intents and purposes is not equipped, it just still is in that slot rather than in your inventory, but all bonuses are gone.

Thank you very much!

It will have a red highlight background to indicate its inactive status as well.