Exception when loading some old player data (now with some other players data)

[Brokkonaut]

Expected behavior

It should load

Observed/Actual behavior

Exception: https://cpaste.de/talupafune.css

Steps/models to reproduce

1. Add this player data to your server: https://webinterface.cubeside.de/temp/ce31ef71-5622-477b-a450-50e2461d7d83.dat
2. Start a plugin with the following test code (in onEnable or whereever)

        OfflinePlayer offlinePlayer = Bukkit.getOfflinePlayer(UUID.fromString("ce31ef71-5622-477b-a450-50e2461d7d83"));
        offlinePlayer.getName();

Plugin and Datapack List

just a test plugin

Paper version

Paper version 1.21.5-103-main@2ba1675 (2025-05-29T12:14:46Z) (Implementing API version 1.21.5-R0.1-SNAPSHOT)

Other

Similar to this #12565 but now with other players