We're in the process of migrating from Bugzilla to JIRA.
When opening issues, we specify the build in which the issue was found in a custom "Build Number" field. We have multiple projects defined in Bugzilla, and unfortunately each of these has its own separate "Build Number" field.
Right now, when I import, I get 3 separate fields, each named "Build Number." What I want to do is combine all the separate build fields from Bugzilla into a single field in JIRA (for any given imported issue, only one of the build fields in Bugzilla has a value), while importing them. Is this possible?
If the above is not possible, is it possible to effect this change via bulk edit of issues somehow?