为什么我在更新现有记录时收到“违反主键约束‘R268_pk’。无法在对象中插入重复键”？

Question

我有一个存储过程，可以从报告表 (RPT.Utility_MasterRecords) 更新生产视图 (WORKORDERS_EVW) 中的记录。 有时，我会遇到以下错误“ MSG 2627，14，Z46A2A41CC6E552044816A2D0463454545DZ 1，步骤NVV268_UPDATE，第43行[批次开始2行2]键值为（16501271）。语句已终止。” 然而，存储过程只是更新视图中预先存在的记录，而不是插入任何新的记录。 我试图了解错误是什么以及如何解决？

存储过程代码：

```-----------------------------------------------------------------------------------------
--Updates CFAdmin.Task_EVW0 and CFAdmin.WorkOrder_EVW for Completed tasks
-----------------------------------------------------------------------------------------
--1. Update Workorders  
--**The WOs need to be updated before the Tasks so we can use the task fields to filter the WOs. 
WITH MRandTASK as
    (SELECT MR.WOID,
            MR.UtilityResponse,
            MR.UtilityCompletedDate,
            Task.CompletedDate
     FROM RPT.Utility_MasterRecords as MR
        INNER JOIN CFAdmin.Task_evw as Task
            ON MR.TaskID = Task.OBJECTID) --need this CTE so we can filter WOs based on the task completed date

MERGE CFAdmin.Workorder_EVW AS T
USING MRandTASK AS S
ON T.ObjectID = S.WOID

WHEN MATCHED
        AND S.UtilityResponse = 'Completed' 
        AND S.UtilityCompletedDate IS NOT NULL 
        AND S.CompletedDate IS NULL

THEN 
    UPDATE
    SET
    T.WOEntity = 0, --In-House
    T.WireConflict = 5, --"All Conflicts Resolved",
    T.Comments = ISNULL(T.Comments, '') + ' ' + '.Utility reported completed date:' + ' ' + CAST(S.UtilityCompletedDate as nvarchar(25));



--2. Update tasks
MERGE CFAdmin.Task_EVW AS T --Target
USING RPT.Utility_MasterRecords  AS S --Source
ON T.ObjectID = S.TaskID --Unique; Work Order was not used since some Work Orders have two tasks

WHEN MATCHED 
        AND S.UtilityResponse = N'Completed' 
        AND S.UtilityCompletedDate IS NOT NULL 
        AND T.CompletedDate IS NULL 
THEN 

    UPDATE 
    SET 
    T.CompletedDate = GetDate(),
    T.UpdatedByName = 'ConEdison',
    T.UpdatedDate = GetDate(); ```