pytorch_lightning.utilities.exceptions.MisconfigurationException: You have asked for `amp_level='O2'` but it's only supported with `amp_backend='apex'`.

[OlfwayAdbayIgbay]

I am trying to fine-tune on a set of sequences, using a A100 GPU and the exact example script from the github mainpage, and it throws this error.

What to do here?

[1512474508]

I meet this same error, how to deal with?