This is the reason why sometimes the release does not show the latest tagged version.
Also this may cause problems when the target version is modified by the client as it can be overwritten by connect.
To fix projects affected by that you should execute this command with nuxeo-shell (on the document correspoinding to the studio project):
setp -xpath sp:prefs -value project.version=3.0.8
where 3.0.8 is the last released version (you will have another version in your case)