diff --git a/extract-decisions.py b/extract-decisions.py
index 97068f1..b90cbb8 100644
--- a/extract-decisions.py
+++ b/extract-decisions.py
@@ -388,6 +388,8 @@ def _prepare_branch(branch_name: str) -> bool:
         subprocess.run(["git", "fetch", "origin", "main"], cwd=cwd, check=True, capture_output=True)
         subprocess.run(["git", "checkout", "main"], cwd=cwd, check=True, capture_output=True)
         subprocess.run(["git", "reset", "--hard", "origin/main"], cwd=cwd, check=True, capture_output=True)
+        # Delete branch if it already exists (from a failed previous run)
+        subprocess.run(["git", "branch", "-D", branch_name], cwd=cwd, capture_output=True)
         subprocess.run(["git", "checkout", "-b", branch_name], cwd=cwd, check=True, capture_output=True)
         print(f"Branch created: {branch_name}")
         return True