版本：V7.0+PT122668
问题：个别物料BOM正查报错，BOM完整性检查没有发现问题。BOM正查扩展添加过采购员、默认供应商、参考成本等字段。
发生时间： 19:40:26
错误编号： 0dace9dd44a84c8bac13728f70024eb1
错误信息： An item with the same key has already been added.
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调用堆栈：
at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
at Kingdee.K3.BD.App.Core.UnitConvertService.GetUnitConvertRateList(Context ctx, List`1 paramList)
at Kingdee.K3.MFG.ENG.App.Core.BomQueryService.RestoreDenNum(Context ctx, IEnumerable`1 querys)
at Kingdee.K3.MFG.ENG.App.Core.BomQueryService.GetBomQueryForwardResult(Context ctx, List`1 sourceData, MemBomExpandOption_ForPSV option)
at Kingdee.K3.MFG.ServiceHelper.ENG.BomQueryServiceHelper.GetBomQueryForwardResult(Context ctx, List`1 sourceData, MemBomExpandOption_ForPSV option)
at Kingdee.K3.MFG.ENG.Business.PlugIn.DynamicForm.BomQueryForward.FillBomChildData()
at Kingdee.BOS.Core.DynamicForm.PlugIn.DynamicFormViewPlugInProxy.FireButtonClick(ButtonClickEventArgs e)
at Kingdee.BOS.Web.DynamicForm.DynamicWebFormView.ButtonClick(String key, String menuKey)
at Kingdee.BOS.Web.DynamicForm.DynamicWebFormController.ButtonClick(String buttonKey, String menuKey, JSONArray postDatas)
