专业版升级旗舰版使用工具报错

专业版9.1 升级到 10.0 再升级到12.3 没问题 然后使用工具升级过程报错。语句已终止。
INSERT 语句与 FOREIGN KEY 约束"FK_FItemClassID"冲突。该冲突发生于数据库"KISTOAIS20160315194301"，表"dbo.t_ItemClass", column 'FItemClassID'。---===========插入t_Item前先删除触发器t_Item_AutoNumber,插入完成后在补上,否则插入过程会报错========
Drop TRIGGER t_Item_AutoNumber
Insert into t_Item(
FItemID,
FItemClassID,
FExternID,
FNumber,
FParentID,
FLevel,
FDetail,
FName,
FUnUsed,
FBrNo,
FFullNumber,
FDiff,
FDeleted,
FShortNumber,
FFullName,
UUID,
FGRCommonID,
FSystemType,
FUseSign,
FChkUserID,
FGrControl
--FModifyTime
--FRightUserID
)
select
FItemID,
FItemClassID,
FExternID,
FNumber,
FParentID,
FLevel,
FDetail,
FName,
FUnUsed,
FBrNo,
FFullNumber,
FDiff,
FDeleted,
FShortNumber,
FFullName,
UUID,
FGRCommonID,
FSystemType,
FUseSign,
FChkUserID,
FGrControl
--FModifyTime 不能将显式值插入时间戳列
--FRightUserID K/3中没有FRightUserID
from KIS_t_Item

试过删除触发器 还是不行