Trellis Provision: Failed to update apt cache: unknown reason

trellis
,
9

For me this comment fixed it:

SSH into the remote server and run:

sudo apt-key del 7BD9BF62
sudo apt-key del B49F6B46
sudo apt-key del 8D88A2B3
sudo apt-key adv --fetch-keys https://nginx.org/keys/nginx_signing.key
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