Thank you for your reply and the links. The links point to the checklists for the Alps and for Friuli Venezia Giulia. Since the checklists have been giving internal error messages recently: https://forum.inaturalist.org/t/checklist-error/26228
I am wondering if perhaps this may be a side effect of that bug?
There is no bug – if any place that contains an observation has it marked introduced, it will show introduced.
Theoretically, to have this observation show not introduced, either the boundary for the Alps needs to be modified to not include this place, or the status in the Alps needs to be modified to not be introduced. However, the Alps is too large to modify, so in practice the only way to not show introduced on this observation is to removed the introduced status in the Alps.
Generally speaking, it’s not a great idea to add a status to a large place that has both native and introduced populations. Adding the status at a smaller level is usually a better idea.
to mean that the linked observation is marked introduced but it shouldn’t be. If the problem is actually just that the two places disagree, then yes, another solution is to change them both to introduced.