[Users] Can't move a directory from one MH-mailbox to another MH-mailbox

[Dieter Rohlfing]

I'm using Claws Mail version 3.17.8 under Debian 11 (Bullseye).

I created a new MH mailbox and wanted to move some directories from
another MH mailbox to the new one, but Claws says:

> directories can't be moved between different mailboxes

Is there any work-around for this problem?

Dieter