diff --git a/.changeset/fair-spies-rescue.md b/.changeset/fair-spies-rescue.md
new file mode 100644
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+++ b/.changeset/fair-spies-rescue.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-scaffolder-backend-module-github': minor
+---
+
+Ensure `teamReviewers` list is unique before calling API