Comment 4 for bug 1937941

I didn't realise `UPDATE FROM` was so recent for Sqlite! The version on my workstation is indeed older:

```
$ cat /etc/issue.net
Linux Mint 20.1 Ulyssa
$ apt show libsqlite3-0 | grep Version
Version: 3.31.1-4ubuntu0.2
$ sqlite3 --version
3.31.1 2020-01-27 19:55:54 3bfa9cc97da10598521b342961df8f5f68c7388fa117345eeb516eaa837balt1
```

And:

```
$ sqlite3 mixxxdb.sqlite "select * from settings where name = 'mixxx.schema.version';"
mixxx.schema.version|38|0|0
```