仅当从触发器调用时，存储过程才会出错

Question

我正在使用SQL Server对即使在表中由UPDATE触发的内容进行编程。

所以结构就像：在触发器中，我有：

EXEC StoredProcedure1

在StoredProcedure1我有：

INSERT dbo.UnbalancedFreqStops
    SELECT APremise AS PremiseID
        ,geography::ConvexHullAggregate(Location) AS Shape
    FROM 
        (SELECT 
             A.[Premise ID] AS APremise, B.[Premise ID] AS BPremise,
             B.LatLon AS Location, B.[Service Frequency] AS FreqT, B.Mon_Routed AS MonT,
             B.Tue_Routed AS TueT, B.Wed_Routed AS WedT, B.Thu_Routed AS ThuT, 
             B.Fri_Routed AS FriT, B.Sat_Routed AS SatT, B.Sun_Routed AS SunT  
         FROM 
             dbo.Weekly AS A 
        INNER JOIN 
             dbo.Weekly AS B ON A.LatLon.STDistance(B.LatLon) <= (80 * 2) 
        ) AS Clusters 
   GROUP BY 
       APremise    
   HAVING 
       MAX(FreqT) <> (MAX(MonT) + MAX(TueT) + MAX(WedT) + MAX(ThuT) + MAX(FriT) + MAX(SatT) + MAX(SunT));

有趣的是，只有当我从触发器调用存储过程时，它才会因违反主键错误（PremiseId是唯一PK）而出错。如果我（1）单独运行它，或者（2）从另一个存储过程调用它，则存储过程运行正常。

此外，我单独运行查询，发现没有重复的密钥AT ALL。

有人可以启发我吗？

谢谢！