Only save the relation if a commit is found

Data/Utils/HeuristicUtils.py

@@ -34,6 +34,8 @@ def run_worker(chunk: list[dict]):
                 commit_utils = CommitUtils(False, repo_node, None)
                 # We do not need to fetch by remote since the heuristic only uses local commits
                 commit = commit_utils.get_commit_by_sha(most_blamed_commit, False)
+                if commit:
+                    # Only save the commit if it is found in the repository
                     db_repo.save_commit(commit, mapping["vcc_config_code"])
                     db_repo.update_vcc_fixing_commit(
                         mapping["mapping_id"],