diff --git a/backend/api/Services/RobotModelService.cs b/backend/api/Services/RobotModelService.cs
index f66612a2..e5f95272 100644
--- a/backend/api/Services/RobotModelService.cs
+++ b/backend/api/Services/RobotModelService.cs
@@ -104,7 +104,7 @@ public async Task<RobotModel> Update(RobotModel robotModel)
 
         public void DetachTracking(FlotillaDbContext context, RobotModel robotModel)
         {
-            _context.Entry(robotModel).State = EntityState.Detached;
+            context.Entry(robotModel).State = EntityState.Detached;
         }
     }
 }