Can you give any example outside of debbugs? I think this problem is debbugs-specific for the reasons given in bug 52613. (Perhaps we should special-case it.) In every other case it will be because (a) the external bugtracker is erroneously tracking the same bug in multiple reports (aka a duplicate), or (b) Launchpad is erroneously tracking multiple bugs in the same bug report.
Can you give any example outside of debbugs? I think this problem is debbugs-specific for the reasons given in bug 52613. (Perhaps we should special-case it.) In every other case it will be because (a) the external bugtracker is erroneously tracking the same bug in multiple reports (aka a duplicate), or (b) Launchpad is erroneously tracking multiple bugs in the same bug report.