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Server version IL2 1946 v4.12.2 + HSFX 7.0.3 (History MOD)
SERVER WAS UPDATED TO A NEWEST VERSION OF HSFX, PLEASE RUN THE AUTOUPDATER TO INSTALL IT.
FLYING WITH ANOTHER VERSION OF HSFX THAN THE LATEST ONE (7.0.3) IS NOT ALLOWED..
Proper way to upgrade hsfx to the newest version can be found HERE