This is one of several problems with the places databases and some people recommend not bothering to resolve places at all. However, I find it useful to do research by location, especially with families that have been there over many generations, so I resolve them as far as I can.
In the case you are describing, sometimes, but not always, it works to delete the GPS/LatLong numbers and resolve again. You will get a message that says you had specified a specific point (even though you probably didn't) and if you continue the location will change to the database default. Go ahead and do that.
There are a number of other frustrations in the place database - do a search here in this forum to find long discussions about them. As place is one of the genealogy trinity - name, place, date - I don't know why it hasn't been addressed more thoroughly by a genealogy software company. As far as I know, FTM is as good as any other. Most software is name/person-centric. Clooz is event/date centric. Haven't found one that's place/location centric but I have hope! :)