I'll cut right to the chase. I'm playing the Aquarius expedition and I got a ship called The Celeste when I started. I fixed it up a bit, filled the inventory, and then, when I got enough nanites, I claimed the Iron Vulture from a previous expedition at The Anomaly.
The Iron Vulture appeared, and I began emptying some of my exosuit storage so I could transfer stuff out of The Celeste into the Vulture. For some reason, however, I cannot spawn in The Celeste again. So the ship, its technology, and cargo are all gone.
I have not had this problem in the past, so I'm really not sure what happened.
I can't even remember everything I lost, but I really wish I could get it all back.
I advise caution for anyone else looking to do the same thing.
I tried restarting the game. I should have reloaded my save. I figured it was a temporary glitch that would sort itself out after restarting.
Oh well. I've moved on. Just a bit frustrating.
It's possible I just pressed the wrong green button and replaced my ship instead of adding another, although I do know how to do that properly, so I must have really messed it up.