So i fond out how to fix the degasi sea bases! here is how. (note that it needs the console) (i did this on Xbox one, so it might not work for all platforms)

Step one: Tipe "entreset" into the console,to reload all assets but terrain

Step two: while it reloads, place part of a habitat where the degasi base was, and the degasi base shall most likely not load.

Step three: now you can bild a new base, fix the degasi base, remove it,or some thing else! however, apon reloading the area, the degasi base will be back where it originely was. this can be fixt however by reapetig step one and two.

(Sorry for my bad speling)