I have tried JsonRollback script,it work but some of bone are move and rotate, I used tool to convert the project created in version 3.6.5 of spine to the 2.1.27 version, I understood this tool It supports going from version 3.3.xx to 2.1.27, is it possible have ways to convert the project in version 2.1.27 ? :sweat: btw, i used cocos2d-x-3.9