diff --git a/Repository/BackendRepository/Implement/NiagaraDataSynchronizeRepository.cs b/Repository/BackendRepository/Implement/NiagaraDataSynchronizeRepository.cs
index b1c5a91..77a3afd 100644
--- a/Repository/BackendRepository/Implement/NiagaraDataSynchronizeRepository.cs
+++ b/Repository/BackendRepository/Implement/NiagaraDataSynchronizeRepository.cs
@@ -655,8 +655,9 @@ namespace Repository.BackendRepository.Implement
                         StringBuilder sb = new StringBuilder();
                         //先全部關閉
                         sb.Append("update device_item set is_show_history=0;");
-                        sb.Append("update device_item set is_show_history= 1" +
-                        "(select  distinct  device_system_tag, device_name_tag, device_point_name From import_niagara_item);");
+                        sb.Append("update device_item set is_show_history = 1 " +
+                            "WHERE(device_system_tag, device_name_tag, points) IN " +
+                            "(select  distinct  device_system_tag, device_name_tag, device_point_name From import_niagara_item);");
                         await conn.ExecuteAsync(sb.ToString());
                     }
                     catch (Exception exception)