WVBTDT2 isn't in the OTA database, it's a victim of the having a real TMS/Gracenote stationId below 65535 (0xffff) issue. Those are stuck in their 2009 states, including entries that were inactive at the time they hit the limit.
Long story short, during the pre-transition days WVBT had a local weather channel on 43.2, but dropped it in 2007 because LIN was too lazy/cheap to comply with the E/I and EAS requirements for subchannels. So when that 65535 cutoff hit in 2009, the entry for WVBTDT2 (49031) was inactive.