Quick answer: Group duplicate reports automatically by issue so the same bug collapses into one item with a count, and publish a known-issues page so players see an issue is already reported and don't file it again.
The same bug reported fifty times is a huge time sink if you handle each report individually. The fix has two parts: collapse duplicates automatically, and stop them being filed in the first place. Here's how to stop drowning in repeats of the same bug.
Group Duplicates Automatically
Handling the same bug fifty times is wasted effort. Automatic grouping collapses identical reports and crashes into a single issue with an occurrence count, so you triage the problem once and see how many players hit it, rather than reading and judging each report individually.
Bugnet groups duplicate reports by signature automatically, so a hundred occurrences of one bug show up as one item with a count. Grouping doesn't stop duplicates being filed, but it makes them harmless, you handle the issue once regardless of how many times it's reported.
Deflect With a Known-Issues Page
To stop duplicates being filed at all, let players see what's already known. A known-issues page answers 'is this a known bug?' before players report it, so many of those duplicate reports never get sent. Players check the page, see it's known, and move on.
Bugnet's public tracker and known-issues view let players see acknowledged issues, deflecting repeat reports. Combined with grouping, this attacks duplicates from both ends: deflection reduces how many get filed, and grouping collapses the ones that do.
Let Players Upvote Instead of Re-Reporting
A public tracker with upvotes channels the impulse to report into a vote on the existing issue. Instead of filing a duplicate, players add their voice to the known issue, which gives you a demand signal while keeping your report stream clean.
Bugnet supports upvotes on public issues, so players rally behind existing reports rather than creating new ones. Stopping the same bug from being reported twice is grouping duplicates, deflecting with a known-issues page, and enabling upvotes, the combination that keeps repeats from overwhelming you.
Group duplicates automatically so the same bug collapses into one item with a count, and publish a known-issues page so players see it's known and don't file it again.