Neo4j 2.1.2 has been released to address a critical issue that could occur during migration from previous Neo4j releases, particularly when dealing with large volumes of deleted data. The update resolves this concern by ensuring correct record structures are maintained during the upgrade process. Users of Neo4j 2.1.1 are strongly advised to check if they have been affected by this issue and follow a procedure to determine whether their application has encountered an problem, which may involve using an evaluation license of Neo4j Enterprise 2.1.2 or reverting to an earlier backup. The Neo4j team remains committed to ensuring the quality of their software and is continuously working on improving its testing process, including additional upgrade tests with diverse generated stores.