Trying to disable replication on a database you may see this error:-
This error occurred because the same database was disabled on the publisher. It should not be possible to disable a database on the publisher if it is enabled on a subscriber. So Autodesk is intending to address this in the next release of Vault.
The workaround is to enable the database on the Publisher before disabling replication on the Subscriber. Credit goes to Johannes Bauer for working around the issue and sharing so quickly.