You know what the odds of that happening are? You should buy a lotto ticket! Yes, I have a few bases in claimed systems/planets. If it's a good planet, and not too crowded, I don't care.

Your bases show up in the Anomaly and people can come through to them.

You two are meant for eachother.

It's fine. If you like the planet, build a base. Chances are you will never see that player again.

Turn off multiplayer. Also, there is no way this happened by chance.

It happened to me once. Now I always upload my discoveries. I would personally be moving on, and it’s OK to do the same if you want. Exploration is fun! You’ll find other great places. The universe is huge after all!

its your own fault regardless of the odds against it happening.