We are working on an upgrade from JIRA 4.3 to 6.3. We have imported all the data into 6.3 and did significant workflow modifications to resolve the problems with custom groovy scripts etc.
My concern is, when we perform the upgrade on the live system, would it be safe to update the workflows directly in database, after import has completed (JIRA will be down)? Or are we limited to XML import, which will take significant time while configuring new worflow schemes etc?