[Bug] Integer and other crashes

[ZataraTMM]

Description

A clear and concise description of what the bug is.

Reproduce

Steps to reproduce the behavior:

1. starship
2. details on a tech item
3. edit seed
4. get integer crash
5. Couldn't find any enum member that matches the integer -1

Expected Behavior

the seed for a blackmarket item to be changed and work after pressing save.

Files

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Additional Context

Add any other context about the problem here or at least complete the following information.
-I'm trying to change the seed of a ship tech, i put it in, exit, and whenever i save whole program crashes.
Couldn't find any enum member that matches the integer -1
I'm constantly getting similar crashes whenever i save, also always saying 1 unsaved change do u wanna exit, even after saving multiple times it's always 1 unsaved. Is there something i'm missing? i was using portable but switched to normal, still getting a fuckton of crashes at saving or editing something.

Another crash. I click on my save, at the start the blue button to rollback to it, not doing anything else, getting Nullable object must have a value. after pressing save.