'Fix button' ?

I haven't used the dialog editor yet but probably I will have to soon.
I copied a standard Cyseal Civilian dialog to the story directory for my black hole trader and registered the dialog via DB_Dialogs(). But he refuses to speak, although I gave him the same speaker as one of the civilians.
(Does not matter much for now because I only needed a dialog to get access to the trade button.)

But I definitely have re-used UUIDs by only copying a file (and renaming it) instead of creating a new one, maybe that's why he refuses to talk.
(On a side note, I also have no clue how that 'Speaker Manager' works either. ;-)

The site I used before was https://www.uuidgenerator.net/version4 . (Still use it if required)