Hi ,if i update this plugin to the latest but not delete backpack data ,will the players still keep what they have ? i am using 3.2.1 still
thanks

Yes, the update is backwards compatible. Generally any update that does not increase the major version (the first number) is backwards compatible, meaning there will be no behavior changes compared to the previous version except for bug fixes and opt-in features, unless otherwise stated in the update notes. Not every developer properly follows the above guidelines for versioning changes, so it's recommended to always read update notes before updating.

Thank you very much for letting me know ,i would of had a lot of greif if players lots their backpack items .