Nutrient Burn or deficiency ?

Hello everyone,
Please have a look at the pictures below and let me know if it is a deficiency or nutrient burn. Plant is in 3rd week/4th week flowering.

Thanks a lot!
48175107_369701766908189_4161202248963063808_n.jpg 48266894_1248484201958335_2571069141096071168_n.jpg
 
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