Expected behavior

It should load

Observed/Actual behavior

https://cpaste.de/raw/kigoxubige

Steps/models to reproduce

1. Put this player data file your server playerdata folder (it is just one of the player datas from our server causing the exception, it was loading fine in 1.21.4): https://webinterface.cubeside.de/temp/81bb948b-9723-47f9-b8db-f2a816e6d50b.dat
2. Use the code in https://cpaste.de/raw/kigoxubige to load the player data
3. Exception

Plugin and Datapack List

just a test plugin

Paper version

This server is running Paper version 1.21.5-87-main@fa360aa (2025-05-18T22:35:50Z) (Implementing API version 1.21.5-R0.1-SNAPSHOT)
You are running the latest version

Other

No response