diff --git a/database/migrations/2026_10_27_160000_erase_the_link_previews_of_erased_commits.php b/database/migrations/2026_10_27_160000_erase_the_link_previews_of_erased_commits.php
new file mode 100644
index 000000000..c6d293402
--- /dev/null
+++ b/database/migrations/2026_10_27_160000_erase_the_link_previews_of_erased_commits.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Query\Builder;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Str;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        $host = preg_quote(Str::of(config()->string('app.url'))->after('://')->before('/')->value());
+
+        DB::table('link_previews')
+            ->whereRaw('url ~* ?', ["^https?://([^/?#]+\\.)?{$host}/@[^/?#]+/commits/"])
+            ->whereNotExists(fn (Builder $query): Builder => $query->from('commits')
+                ->whereNotNull('user_id')
+                ->whereRaw("commits.id::text = substring(lower(link_previews.url) from '/commits/([0-9a-f-]{36})')"))
+            ->delete();
+    }
+};
diff --git a/tests/Unit/Actions/DeleteUserTest.php b/tests/Unit/Actions/DeleteUserTest.php
index df3242c95..2e99e53fd 100644
--- a/tests/Unit/Actions/DeleteUserTest.php
+++ b/tests/Unit/Actions/DeleteUserTest.php
@@ -353,3 +353,25 @@
     resolve(DeleteUser::class)->handle($user);
     expect(PushSubscription::query()->count())->toBe(0);
 });
+
+it('erases the previews of links to commits that deleted accounts already took with them', function (): void {
+    $tombstone = Commit::factory()->create(['user_id' => null, 'body' => '', 'deleted_at' => now()]);
+    $gone = fake()->uuid();
+    $leftovers = collect([
+        LinkPreview::factory()->create(['url' => url("/@gone/commits/{$tombstone->id}")]),
+        LinkPreview::factory()->create(['url' => url('/@gone/commits/'.mb_strtoupper($gone))]),
+        LinkPreview::factory()->create(['url' => str_replace('://', '://www.', url("/@gone/commits/{$gone}"))]),
+    ]);
+    $kept = collect([Commit::factory()->create(), Commit::factory()->create(['deleted_at' => now()])])
+        ->map(fn (Commit $commit): LinkPreview => LinkPreview::factory()->create(['url' => url("/@{$commit->user->handle}/commits/{$commit->id}")]))
+        ->push(LinkPreview::factory()->create(['url' => "https://example.com/@gone/commits/{$gone}"]))
+        ->push(LinkPreview::factory()->create(['url' => str_replace('://', '://not', url("/@gone/commits/{$gone}"))]))
+        ->push(LinkPreview::factory()->create(['url' => 'https://example.com/redirect?to='.url("/@gone/commits/{$gone}")]))
+        ->push(LinkPreview::factory()->create(['url' => url("/@gone?redirect=/commits/{$gone}")]));
+
+    $migration = require database_path('migrations/2026_10_27_160000_erase_the_link_previews_of_erased_commits.php');
+    $migration->up();
+
+    $leftovers->each(fn (LinkPreview $preview) => $this->assertModelMissing($preview));
+    $kept->each(fn (LinkPreview $preview) => $this->assertModelExists($preview));
+});