Version of BlockProt

BlockProt 0.4.12 , Server 1.17.1 and GriefPrevention

Description of the bug

dupe a shulker box bug.

Steps to reproduce

Please check yt movie.
https://youtu.be/yECXhwp51t8

A player using GP places a box on his territory.
Lock the box and then unlock it.
Other players can copy a box by destroying it against it

Additional context

No response

Hi @taka1945, the video really helped me a lot, thanks for that.
Could you please check the attached .zip file here and see if that fixes your issue?