help what deficiency and how to fix

Hey 5 was into flower and just can't get rid of the deficiency any help would be greatly appreciated thought it was a mag problem not so sure anymore

User error.

Pics of the effected area, the whole plant and of new growth is the best way to get a good answer. Take those with the HPS OFF!

What style? Hydro or Soil or Coco?
What are you feeding?
How much?
How often?
pH if it is not soil please.