How to Migrate sqlite to mysql

The Kanboard migration path from SQLite to MySQL isn’t terribly clear (it’s not documented in Kanboard’s docs about MySQL nor Kanboard’s docs about SQLite) and I wish it was an officially supported procedure with a built-in tool for it.

I tried out that third-party script linked above and was unable to migrate, it fails on the first line of the resulting SQL dump: https://github.com/oliviermaridat/kanboard-sqlite2mysql/issues/21
…John, didn’t you run into this problem?

I’d appreciate any help in troubleshooting/solving this. The author of that migration script hasn’t made commits since over a year and so I’m not sure if it’s still maintained and if he will be around to answer this problem; that’s another reason why I would hope for this to be an “officially supported and documented” tooling part of the core of Kanboard (since SQLite performance is so limited, and even recommended against in the official documentation)…