You should really read all the upgrading documentation. Your point is described here: http://www.bestpractical.com/docs/rt/4.2/UPGRADING-4.0.html#Common-issues
Chris Am 13.11.2013 03:09, schrieb CLOSE Dave: > Trying to upgrade RT with MySQL (actually MariaDB) from 3.8.7 to 4.2.0. > I've reached the database upgrade step and it starts correctly. But it > stops after reaching the upgrade to 3.9.3, with some errors reported on > 3.9.2 as well. But before I try to resolve these errors, I'd like to > clarify a simple point. When does the old database get copied to the new > one? > > RT 3.8.7 uses the database rt3; RT 4.2.0 uses rt4. As near as I can > tell, the upgrade script is essentially creating an empty database and > hasn't made any modifications at all to rt3. Is this expected? Should > the database content be copied from rt3 to rt4 before all the schema > changes or after? What does that copy? >