diff --git a/WarehouseMgr/Tnb.WarehouseMgr/WmskittingOutService.cs b/WarehouseMgr/Tnb.WarehouseMgr/WmskittingOutService.cs
index 25970540..c3079634 100644
--- a/WarehouseMgr/Tnb.WarehouseMgr/WmskittingOutService.cs
+++ b/WarehouseMgr/Tnb.WarehouseMgr/WmskittingOutService.cs
@@ -218,7 +218,7 @@ namespace Tnb.WarehouseMgr
                     }
                     x.id = SnowflakeIdHelper.NextId();
                     x.bill_id = input.requireId;
-                    x.bill_d_id = billDId;
+                    x.bill_d_id = billDId!;
                     x.org_id = _userManager.User.OrganizeId;
                     x.create_id = _userManager.UserId;
                     x.create_time = DateTime.Now;