# GriefPrevention3D v18.2.1
**Wiki:** [GriefPrevention3D Wiki](https://github.com/castledking/GriefPrevention3D/wiki)
## Fixes
### `/claimlist` no longer shows duplicate claims; claim blocks no longer go negative
Fixed a bug where a player's claims could appear duplicated in `/claimlist` and their available claim blocks would drift negative. The issue affected players after logout or server restart (whenever their `PlayerData` was freshly created).
**Root cause:** `DataStore.addClaim()` added the claim to the global `this.claims` list first, then called `ownerData.getClaims()`. When the player's `PlayerData` was newly created (claims vector == null), `getClaims()` lazy-initialized by scanning `this.claims` — finding the same claim — then the caller added it a **second** time. Each duplicate caused `getRemainingClaimBlocks()` to subtract the claim's area twice, and `/claimlist` showed the claim twice.
The same bug existed in `changeClaimOwner()` (claim transfer).
**Fix:** Guard both `.add()` calls with a `contains()` check so a claim is never double-added to the owner's vector after lazy init already picked it up.
- `DataStore.java`: `addClaim()` and `changeClaimOwner()` now check `!ownerClaims.contains(claim)` before adding.
Optional dependencies
QuickShop-Hikari
Any compatible version
PlaceholderAPI
Any compatible version
VaultUnlocked
Any compatible version
Developer information
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