Restrict a GriefPrevention subdivision without changing the parent claim

A subdivision can inherit permissions from its parent. If a private room remains accessible to parent members, check inheritance before moving chests or recreating the whole claim.
Before you start
GriefPrevention has different documentation for legacy v16 and newer alpha releases. Match your installed branch before following commands. Test with a claim owner and an untrusted account, and keep claim ownership distinct from operator or bypass permissions.
Work through the check
Confirm the installed GriefPrevention branch and record the parent claim’s boundaries, owner and trust list before creating or editing a subdivision.
Use the branch’s documented subdivision mode and define a small test area inside the parent, preserving the parent boundary.
Inspect the subdivision trust and, where supported, use 
/RestrictSubclaim while standing in the intended subdivision to stop inherited permissions before adding its specific members.
Test a parent-only member and a subdivision member inside the room and in the surrounding parent area, using harmless interactions and no operator bypass.
Confirm the result
The restricted subdivision should follow its intended local trust while the surrounding parent retains its original members. A player trusted only in the room should not gain unrelated claim access.
If the result differs
If access remains open, verify the player is actually inside the subdivision and has no direct broader permission. Tool modes and inheritance details differ between release branches.
Recover safely
Restore the recorded subdivision rules if the trial excludes intended members. Return the tool to basic claim mode after editing; do not abandon the parent claim to repair a room’s trust settings.
Documentation and related help
Check the GriefPrevention maintainer documentation and GriefPrevention maintainer reference against your installed release before applying changes.
Related CloudExa help: Set up player land claims with GriefPrevention and Find Minecraft logs and send useful troubleshooting details.