Figured it would be a good idea to collect known issues in one place:

1. Dedicated servers with mods to enable more than 15 pals per base can have pals 16+ assigned to a base deleted Source

• For the above, I would have dedicated servers with such mods hold off on 1.5.1 until players get a chance to put all their base pals back in their palbox and/or update their worldoptions.sav file with the correct max pals: Website to create a custom worldoption.sav Local run version or better yet set the max number of workers in PalWorldSettings.ini then use this tool to create a new worldoptions.sav file.
• Servers that are using a custom WorldOption.sav to increase the Base worker limit may be spared from this issue.
• “Deleted” pals may be in spheres above the vicinity of the Palbox.

2. Pre patch incubators will not work (will only accept/store small pal souls)

• Destroying and rebuilding the incubator seems to fix this.

3. The Pal Info mod (and likely any mod that shows Pal info) conflicts with 2.0.6 and as such should be disabled until the mod author can update the mod for 2.0.6
4. Players with UE4SS installed get a blank screen when trying to start the game and log in.

• Go to Palworld/Binaries/Win64/Mods/ edit mods.txt to change BPModLoaderMod from 1 to 0.
• Note, UE4SS Blueprint type mods will not work with the fix above but at least you’ll be able to log into the game Credit

5. Dedicated servers may fail to launch

• The server executables have new names.
• Make sure your scripts point to the new server names (old ones had -test at the end, new ones are -release I believe)
• If you’re using any firewall rules that point to a specific name for the dedicated server process, it’ll need to be updated to the new binary name.