What’s the fix?

PH AND ENVIORMENT ON POINT.

They are too far along for a fix. Id say a gradual buildup of a macronutrient. Would’ve been happening but unnoticeable for a while now. Not much you can do about it now, still decent looking nugs

Need more details about your environmental parameters. "on point" doesn't give enough info to break it down. What is your relative humidity (day, and night) sitting at? Based on the concentric shape of the spots, and the appearance of the rest of the leaves on which the spots occur, it looks like the beginning of some kind of leaf fungus to me.