Cam anyone identify this? Need help

Need help identifying what is wrong with my hemp plant. I have attached a photo of the leaf. Looks like some type of fungus but I have never bumped into this before. Thanks in advance for any help provided

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Sorry if you already have… the first thing I do is roll my leaves over and look for unwanted guests…

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Possible Mg deficiency??

What’s your medium, pH, nutes

Have you sprayed them with anything.

Packee

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I think it might be Septoria.

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