Just drop in the plugins folder and leave the remaining job for the plugin!

This plugin creates a light database registering all the shulker boxes and if any shulker box has the same ID as another (dupped one) the plugin just delete them.

It's impossible to dupe anything using shulkers now with this plugin :3

Depends on Vault

Vault is used to check offline players inventory to prevent dupe while offline 0-0

Thanks for downloading!!!