# GriefPrevention3D v18.0.10
**Wiki:** [GriefPrevention3D Wiki](https://github.com/castledking/GriefPrevention3D/wiki)
Thanks to [@thiagorigonatti](https://github.com/thiagorigonatti) for [fixing these issues](https://github.com/GriefPrevention/GriefPrevention/pull/2608)!
## Upstream Issue Fixes
### Placing a chest next to a claimed double chest breaks the double chest (`#2606`)
**Before:** Placing a single chest outside a claim adjacent to a double chest fully inside the claim would forcibly split the double chest into two singles — even though no cross-claim double chest was actually formed.
**After:** The double chest is left untouched. Only adjacent single chests are candidates for the cross-claim split logic; existing double chests inside the claim is preserved.
The fix adds a guard that skips neighboring chests that are not `Chest.Type.SINGLE`, preventing modifications to existing valid double chests fully inside a claim.
### Single chests on claim borders can be extended into double chests from outside claims (`#2609`)
**Before:** A player without build permission could place a chest outside an admin claim next to a claimed single chest, and the claimed chest would be extended into a double chest crossing the claim boundary. This happened because both wilderness and admin claims have a `null` owner ID, and the boundary check treated them as the same owner.
**After:** The chests are kept as separate single chests. A `sameClaimOwner` helper uses reference equality for null claims, ensuring wilderness and admin claims are only considered the "same owner" when both are literally null (both wilderness).
## Compatibility
| Category | Support |
| ------------------ | ------------- |
| Minecraft Versions | 1.8.8 -> 26.1.x |
| Minimum Java | Java 8 |
| Bukkit API Target | 1.13 |
## Migration
No data migration is required.
## See Also
- [Issue #2606](https://github.com/GriefPrevention/GriefPrevention/issues/2606) — Double chest split bug
- [Issue #2609](https://github.com/GriefPrevention/GriefPrevention/issues/2609) — Admin claim chest boundary bug
- [PR #2608](https://github.com/GriefPrevention/GriefPrevention/pull/2608) — Double chest split fix by @thiagorigonatti
- [PR #2610](https://github.com/GriefPrevention/GriefPrevention/pull/2610) — Admin claim owner comparison fix by @thiagorigonatti
Optional dependencies
QuickShop-Hikari
Any compatible version
PlaceholderAPI
Any compatible version
VaultUnlocked
Any compatible version
Developer information
Projects on Modrinth are automatically available through a Maven repository for use with JVM build tools such as Gradle.
maven { name = "Modrinth"; url = "https://api.modrinth.com/maven" }
