diff --git a/.github/workflows/release-pr.yml b/.github/workflows/release-pr.yml
index 1ba26b5..14dd16e 100644
--- a/.github/workflows/release-pr.yml
+++ b/.github/workflows/release-pr.yml
@@ -12,7 +12,7 @@ permissions:
 
 concurrency:
   group: release-pr-${{ github.ref }}
-  cancel-in-progress: false
+  cancel-in-progress: true
 
 jobs:
   release-pr:
@@ -37,6 +37,16 @@ jobs:
       - name: Validate release metadata scripts
         run: bun run release:validate
 
+      - name: Close stale release PR
+        run: |
+          PR=$(gh pr list --head release-please--branches--main --json number --jq '.[0].number')
+          if [ -n "$PR" ]; then
+            echo "Closing stale release PR #$PR so release-please regenerates with full changelog"
+            gh pr close "$PR" --delete-branch=false
+          fi
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Maintain release PR
         id: release
         uses: googleapis/release-please-action@v4.4.0