diff --git a/WarehouseMgr/Tnb.WarehouseMgr/WmsSaleService.cs b/WarehouseMgr/Tnb.WarehouseMgr/WmsSaleService.cs
index 6b8ecd98..d11fa558 100644
--- a/WarehouseMgr/Tnb.WarehouseMgr/WmsSaleService.cs
+++ b/WarehouseMgr/Tnb.WarehouseMgr/WmsSaleService.cs
@@ -53,7 +53,7 @@ namespace Tnb.WarehouseMgr
 
             CreateTaskEntity ctEntity = new();
             ctEntity.maintableid = multi.pkId;
-            ctEntity.materialids = multi.outStockDList?.Select(x => x.material_id).ToList() ?? Array.Empty<string>().ToList();
+            ctEntity.materialids = multi.outStockDList?.Select(x => x.material_id!).ToList() ?? Array.Empty<string>().ToList();
             ctEntity.triggerevent = EnumTriggerEvent.出厂检按入厂频次;
             _ = _qcCheckPlanService.CreateWmsTask(ctEntity);