Over water or something worst?

Those spots are from the plant burning from the nutes, If youre using a super soil also that will DEFINITELY cause the burn Don't ignore it. Flush your medium with Ph water if you're growing with coco this is a easier fix as coco drains better if not cut out the nutes for a week or so and cut the affected leaves as they won't get better. If you check your PPD and water to run off test the runoff water or skip that step and flush with Ph water

Personally I wouldn't worry too much - your girls appear to be growing well. I've had exactly the same yellowing on mine before and I put it down to light burn while I was running 24/0 schedule. Good luck!

Hey Bro, very suggestive of Ph fluctuations and initial Ca lockout

Hey friend. Yeah she’s probably just a little hungry. Don’t stress too much over a few fan leaves getting messed up. Your new growth looks really nice so just keep doing what you’re doing. In a few weeks them leaves will probably be defoliated so no worries. If the whole plant was suffering I’d see cause for major concern but a few leaves being consumed is just the plants way of using up resources when they’re not given. Your plants are nice!