Error during copy of partner: Partner role SH. Message no. VL864

Hi, I'm getting an antithetic mistake erstwhile doing the Goods Issue (261) Production order. It's an autarkic Production bid without income bid oregon forecast, it was manually created accumulation order, but the mistake doesn't marque sense. It's asking for Partner relation SH missing. Could you delight help?

1. Transaction MIGO
2. Goods contented 261 
3. Enter Production order
4. Set emblem "ITEM OK"
5. Click connected "Check" fastener (Document is ok)
6. Click connected "Post" button
7. The strategy issues the beneath error:

Error during transcript of partner: Partner relation SH. Message no. VL864