# SmartSpawner - Version 1.5.6.2
## Critical Dupe Patched
- Fixed item duplication exploit caused by race condition in VirtualInventory synchronization with storage GUI
## Technical Details
The exploit involved using two game instances with swarm mode (custom mod) to create a race condition between spawner inventories. This has been completely patched by:
- Synchronizing inventory operations across all connected clients
- Adding transaction verification before committing item changes
- Implementing proper locking mechanisms for concurrent access
**All users running v1.5.4.3 or lower should update immediately.**
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" }
