The JSON format changed from 4.2.47-beta to 4.2.48-beta, so importing JSON data from 4.2.48-beta into 4.2.47-beta will lose your bone transform inheritance settings (all 3 checkboxes will be checked after import). If you already saved your project in 4.2.48-beta, it's easiest if you can just wait for the spine-unity runtime to be updated (likely tomorrow, 2024-03-25).
