diff --git a/WarehouseMgr/Tnb.WarehouseMgr/WareHouseService.cs b/WarehouseMgr/Tnb.WarehouseMgr/WareHouseService.cs
index 6015c8d9..f0d72f5d 100644
--- a/WarehouseMgr/Tnb.WarehouseMgr/WareHouseService.cs
+++ b/WarehouseMgr/Tnb.WarehouseMgr/WareHouseService.cs
@@ -263,9 +263,12 @@ namespace Tnb.WarehouseMgr
                                         .Where(it => it.endlocation_code.StartsWith("DT", StringComparison.OrdinalIgnoreCase) &&
                                         !it.area_code.Contains("ELE", StringComparison.OrdinalIgnoreCase))
                                         .ToList();
+                preTasks = preTasks.Where(it => !agvElevatorTasks.Select(x=>x.endlocation_code).Contains(it.endlocation_code)).ToList();
+
                 IEnumerable<WmsPretaskH?> firstEleGrp = agvElevatorTasks.GroupBy(g => g.endlocation_code).Select(t => t.OrderBy(o => o.bill_code).FirstOrDefault());
                 agvElevatorTasks = agvElevatorTasks.FindAll(x => firstEleGrp.Select(y => y.endlocation_code).Contains(x.endlocation_code));
-                preTasks = preTasks.Where(it => !it.endlocation_code.StartsWith("DT", StringComparison.OrdinalIgnoreCase)).Concat(agvElevatorTasks).ToList();
+                preTasks = preTasks.Concat(agvElevatorTasks).ToList();
+                
 
                 List<string> ids = preTasks.Select(x => x.id).Distinct().ToList();
                 List<WmsPretaskCode>? preTaskCodes = await db.Queryable<WmsPretaskCode>().Where(it => ids.Contains(it.bill_id)).ToListAsync();