This might have changed with the newer easa regulation but with jar and initial easa there where no requirement that a GPS database should be up to date even when flying IFR.
It is (was?) Perfectly legal to use an outdated database as long as you verified the position of the waypoints in it. That was litterally what the law text said. And you can add your own waypoints to make up for what could be missing.
Again things might have changed lately but personally I have no issue with flying ifr with an outdated GPS database. I have paper maps and plates and verify these against the GPS database.