Upgraded My pc and now I can't use my product key(My old pc is unusable right now)

[Mohamed Hossam2]

Well , I recently bought a Windows 10 Home Microsoft Key from g2a to activate my windows ,A couple of weeks later My pc had a problem with the motherboard So I did a whole upgrade only keeping the graphics card, ssd & hddNow I can't use my product key as It says this key is already used (AKA my old device which is unusable now ... ) so any way to use my key again ?

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