Just got prodigy and am experimenting creating NER annotation of data. At first I did ner.manual with --label PER,LOC,ORG, but after completing that and training a simple model I decided I really wanted to have a label "EVT". I poked around to see if there's some way to take my original dataset and "evolve" it and add "EVT", but I can't see a way. I tried things like rerunning ner.manual with all four labels on the original but it says there are no tasks. I tried creating two dataset and "db-merge" or "db-in" on them but that didn't really seem to work (but then I'm still new to this).
I'm early enough into the process that I can just reannotate from the beginning, but I can foresee cases in the future where be might want to add annotations to an existing dataset or even maybe create a couple datasets with a few related labels and then "merge" them together in various ways for specific application domains.