覆盖引入物料报错

覆盖引入物料时报错 ：“引入-批量保存操作 : 未将对象引用设置到对象的实例。”请问大概是什么问题，该怎么解决呢？
版本：金蝶云6.2
报错数据如下：Server stack trace:
在 Kingdee.K3.BD.App.Common.ServicePlugIn.Material.Validator.InvPtyUniquenessValidator.Validate(ExtendedDataEntity[] dataEntities, ValidateContext validateContext, Context ctx)
在 Kingdee.BOS.App.Core.Validation.ValidationService.Validate(IEnumerable`1 dataEntities, ValidateContext validateContext, AbstractValidator[] validators)
在 Kingdee.BOS.App.Core.Validation.ValidationService.TryValidate(IEnumerable`1 dataEntities, ValidateContext validateContext, List`1& errorInfo)
在 Kingdee.BOS.App.Core.AbstractOprerationService.TryValidate()
在 Kingdee.BOS.App.Core.AbstractOprerationService.Validate()
在 Kingdee.BOS.App.Core.AbstractSave.Validate()
在 Kingdee.BOS.App.Core.AbstractOprerationService.DoExcete()
在 Kingdee.BOS.App.Core.AbstractOprerationService.Excute(DynamicObject[] dataEntities)
在 Kingdee.BOS.App.Core.SaveService.Save(Context ctx, BusinessInfo info, DynamicObject[] dataEntities, OperateOption option, String operationNumber)

Exception rethrown at [0]:
在 Kingdee.BOS.Business.DynamicForm.PlugIn.Import.ImportEngine.DoSaveBillData(Dictionary`2 relateRows, DynamicObject[] objs, List`1 lstDy, Boolean isTempStor, Boolean isImportGroup, OperateOption option, List`1 failRelateRows, IOperationResult allResult)
在 Kingdee.BOS.Business.DynamicForm.PlugIn.Import.ImportEngine.ImportData(Context ctx, IDynamicFormView view, FormMetadata formMetadata, InputOutputParameter importParameter, DataSet& failDataSet, List`1 matchfields)