SAP MM Inbound Delivery凭证流里不出现采购订单号？

VL33N显示如下内向交货单，看其凭证流，

看行项目的document flow,

结果类似，对应的PO号码并没有显示在里面，

实际上，该inbound delivery是根据采购订单号来创建的，

如下方式也能以类似document flow的方式显示inbound delivery和对应PO的关系，

下一步，

为啥采购订单号没有出现在inbound delivery的document flow里呢？

经查，有如下的建议：

1), This is a bug fix for a program error by SAP which caused that the document flow was not updated.

2), The document flow between inbound delivery and purchase order is not possible in SAP standard. Only the document flow for stock transfer order and replenishment delivery has been developed. A workaround to show the reference document of the inbound delivery: Inbound delivery > item detail, see the tab 'Predecessor data'. See below screenshot:

-完-

2020-5-6 写于苏州市。