[alcazar]

What happens if you add a new item on two devices simultaneously?

[63stack]

It renames one of them to $hostname_conflicted, or something like that. Keepass has a built in tool for reconciling two databases, you can use that in this scenario.

[prmoustache]

Why would you do that?

By the way, syncthing can manage conflicts by keeping one copy of the file with a specific name and date. You can also decide is one host is the source of truth.