Ships get downgraded to an old design when traversing a damaging warp point into a black hole system

**Describe the bug**
When ships traverse a damaging warp point into a black hole system, they get downgraded to an earlier iteration of their design.

**Steps to reproduce**
1. Warp through a damaging warp point into a black hole system.
2. Load the next turn.

**Expected behavior**
The ship retains its old design.

**Actual behavior**
The ship gets downgraded to an earlier iteration of its design.

**Screenshots**
N/A

**Related issues**
* #573

**Testing plan**
???

**Additional context**
???