[BUG] Campaign map crash when you "leave" during the raise dead caught battle

[R4MPZY]

Describe the bug
Random crash during the campaign map travelling phase if you previously clicked "leave" during a raise dead caught battle

To Reproduce
Steps to reproduce the behavior:

1. Go to 'graveyard'
2. Click on 'attack the guard->then in battle press tab and retreat->then press leave the battle ( surrender some troops )'
3. A party called "S nightwatch spawns
4. See error after some time when travelling

Times Reproduced
[2] / [2] ( in a provided save )

Expected behavior
Not to crash or being able to leave the battle

Additional context
discord link to the issue (https://discord.com/channels/702088927380635678/886588234820374539/1298792755069325362)
Seems to be another one having the same issue https://discord.com/channels/702088927380635678/886588234820374539/1297956839631225003