SALV is default Asobo scenery. I do have the free Paderborn scenery installed (aerosoft-paderborn), but it is via the Marketplace, so is not in my Community folder, but the OneStore folder instead.
I would have been surprised if they were related as SALV is in South America.
Looking at it closer, it appears there are two ICAO’s overlayed here, SALV, and OVJ.
If I play with LNM, and configure it to use Navigraph for all features, then SALV disappears, and OVJ remains.
Just trying again, with Paderborn moved out of the OneStore folder, and the Navigraph data removed from the Community folder.
Now search for OVJ, it finds nothing:
So it looks like the Navigraph data is adding the OVJ airport.
Depending on which sim you look at, it is named differently:
X-Plane - SA8I
MSFS - SALV
Navigraph - OVJ