diff --git a/backend/main.py b/backend/main.py
index d3911a5..8800603 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -1936,7 +1936,7 @@ async def reset_section(
     db: Session = Depends(get_db),
 ):
     """Reset (truncate) a specific data section. Creates auto-backup first."""
-    valid = {"attendance": AttendanceRecord, "holidays": Holiday, "leaves": LeaveRecord}
+    valid = {"attendance": AttendanceRecord, "holidays": Holiday, "leaves": LeaveRecord, "accident": Accident}
     if section not in valid:
         raise HTTPException(status_code=400, detail=f"Unknown section: {section}")
     # Auto-backup before reset