I right clicked the right chest from a double chest with a key panel but the left ppc is owned by no one and has the password that i set on the right ppc but i wanted to remove the password protected double chest so now there is a unremovable block in the server with some friends so i have to ask my friend to delete it

p.p.c = password protected chest
version 1.12.2
mod version 1.8.21

Set the allowBlockClaim configuration option to true, then right-clicking the chest with a Universal Block Modifier to claim it. Note, that enabling this configuration option only allows people to claim blocks that don't have an owner like this chest for example.