looks like this may have already been resolved.
since it’s native in part of the L&C Natl Historic Trail, i think the proper thing is to list it as either native or else don’t provide a specific establishment means for that place (which may be what was done here). anyone can change establishment means, and usually you will be able to identify and change the establishment means records from the status tab of the taxon page (https://www.inaturalist.org/taxa/42652-Didelphis-virginiana). but in this case, that page can display only up to 100 establishment means records, and there are more than that. so you could resort to a workaround to list them all: https://jumear.github.io/stirfry/iNat_taxon_est_means.html?taxon_id=42652.