diff --git a/airflow-core/src/airflow/api_fastapi/core_api/routes/ui/grid.py b/airflow-core/src/airflow/api_fastapi/core_api/routes/ui/grid.py
index de6eac73a9b65..2ad0d54cb8c6a 100644
--- a/airflow-core/src/airflow/api_fastapi/core_api/routes/ui/grid.py
+++ b/airflow-core/src/airflow/api_fastapi/core_api/routes/ui/grid.py
@@ -171,6 +171,7 @@ def get_dag_structure(
                 .where(
                     DagRun.id.in_(run_ids),
                 )
+                .distinct()
             ),
         )
     )