diff --git a/pkgs/sdk_triage_bot/lib/triage.dart b/pkgs/sdk_triage_bot/lib/triage.dart
index de5d0498..a4a0cefe 100644
--- a/pkgs/sdk_triage_bot/lib/triage.dart
+++ b/pkgs/sdk_triage_bot/lib/triage.dart
@@ -29,9 +29,9 @@ Future<void> triage(
   final issue = await githubService.fetchIssue(sdkSlug, issueNumber);
   logger.log('## issue ${issue.htmlUrl}');
   logger.log('');
-  final labels = issue.labels.map((l) => l.name).toList();
-  if (labels.isNotEmpty) {
-    logger.log('labels: ${labels.join(', ')}');
+  final existingLabels = issue.labels.map((l) => l.name).toList();
+  if (existingLabels.isNotEmpty) {
+    logger.log('labels: ${existingLabels.join(', ')}');
     logger.log('');
   }
   logger.log('"${issue.title}"');
@@ -88,6 +88,11 @@ ${trimmedBody(comment.body ?? '')}
     exit(1);
   }
 
+  // If an issue already has a `type-` label, we don't need to apply more.
+  if (existingLabels.any((label) => label.startsWith('type-'))) {
+    newLabels.removeWhere((label) => label.startsWith('type-'));
+  }
+
   // ask for the summary
   String summary;
   try {
diff --git a/pkgs/sdk_triage_bot/test/triage_test.dart b/pkgs/sdk_triage_bot/test/triage_test.dart
index c07f737f..588abcd2 100644
--- a/pkgs/sdk_triage_bot/test/triage_test.dart
+++ b/pkgs/sdk_triage_bot/test/triage_test.dart
@@ -74,4 +74,26 @@ void main() {
     expect(githubService.updatedLabels, contains(startsWith('area-')));
     expect(githubService.updatedLabels, contains('triage-automation'));
   });
+
+  test('ignore redundant type labels', () async {
+    final githubService = GithubServiceMock();
+    final geminiService = GeminiServiceStub();
+
+    githubService.returnedIssue = Issue(
+      url: 'https://github.com/dart-lang/sdk/issues/55869',
+      title: 'Add full support for service ID zones',
+      number: mockIssueNumber,
+      body: 'Lorem ipsum.',
+      labels: [IssueLabel(name: 'type-enhancement')],
+    );
+
+    await triage(
+      mockIssueNumber,
+      githubService: githubService,
+      geminiService: geminiService,
+      logger: TestLogger(),
+    );
+
+    expect(githubService.updatedLabels, ['area-vm', 'triage-automation']);
+  });
 }