How to use unlimited number of influeces for imported FBX

Hi, I have a character with 16 max skincluster influences per vertex. These influences are inherited from the metahuman and I’m not allowed to change or clamp them. When I import this character to UE, weights are getting clamped to the max of 8 per vertex automatically. Even if I change project skincluster settings to Support 16-bit bone index and Use unlimited bone influences, I still get skincluster weights clamped to 8.
Does anyone know how to solve this issue?
Thanks!

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