This release is identical to 23.12.1: https://github.com/ArcadeData/arcadedb/releases/tag/23.12.1
Version 23.12.1 wasn't published to Maven Central because there was an outage at that time, then resolved by Sonatype in a few hours. After that, seems like Sonatype has mixed up the jars and doesn't allow us to proceed with the release, because it's registered as already released, but there are no jars online...