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Temporary workaround: log in to the ACP of your b1gMail development copy, go to "Tools" -> "Optimize" and chose "Check structure". Let the ACP fix any issues it found. Delete...

Check structure also not work, seems its an error with mysql 8.1.

Hello, try to look here: https://stackoverflow.com/questions/38002543/apt-get-update-returned-a-non-zero-code-100