Anyone else know this glitch?

When i was in middle school i used to play spore on my home PC a lot. I used to have a lot of saved games. One day one of these games glitced, and i got this weird glitch in space stage. I didn't get the captain badge, and my empire, instead of telling me "go to the planet X" told me to go to UNKNOWN<mission_UFO_wreck_target_planet>. This thing scared me a lot lol. The bad thing was that more and more saved games became infected with this glitch and i had to uninstall the game. I wonder if someone else ever got it because on the internet there is not much about this glitch.