返工工单 返回数据报错

版本：V6.1 + 10月份的补丁
问题：新增“直接入库-返工工单”，选择多个物料，点击“返回数据”报错。

Value cannot be null.
Parameter name: source

发生时间：10:30:49
错误来源： System.Core
错误信息：Value cannot be null.
Parameter name: source
===================================================
调用堆栈：
at System.Linq.Enumerable.GroupBy[TSource,TKey](IEnumerable`1 source, Func`2 keySelector)
at Kingdee.K3.MFG.PRD.Business.PlugIn.Bill.MOBillEdit.BatchCreateEntityEntrys(List`1 materialIds)
at Kingdee.K3.MFG.PRD.Business.PlugIn.Bill.MOBillEdit.AfterF7Select(AfterF7SelectEventArgs e)
at Kingdee.BOS.Core.DynamicForm.PlugIn.DynamicFormViewPlugInProxy.FireAfterF7Select(AfterF7SelectEventArgs e)
at Kingdee.BOS.Web.DynamicForm.DynamicWebFormView.DoLookUpAfterShow(String key, Int32 row, ILookUpField lookUpField, FieldAppearance ap, FormResult result, String combinedFieldKey)
at Kingdee.BOS.Web.DynamicForm.DynamicWebFormView.<>c__DisplayClass58.b__57(FormResult result)
at Kingdee.BOS.Web.DynamicForm.DynamicWebFormView.<>c__DisplayClass3c.b__3a()
错误数据： System.Collections.ListDictionaryInternal