Groups converted to tags and unable to create new groups: why? [SOLVED]

DT3 unexpectedly converted my groups into tags, and when I choose to create a new group, it creates a new tag instead.

What’s wrong?
How do I fix it?

Thank you!

Is the option Exclude groups from tagging in File > Database Properties disabled? By default it’s enabled.

1 Like

I had.
Now it’s all right.
Thank you very much!