Sonatype Nexus Repository 3.70.2 is now available. This release fixes a Database Migrator issue that caused some users to see duplicate key errors after migrating from OrientDB to H2. See the 3.70.2 Release Notes for full details.
Note that this release is part of our 3.70.x line, which still supports OrientDB; these downloads are available in the 3.70.x Downloads section.