Net book value for co. & trad.ptnr & in yr & per. & not specified

What causes this issue?

<GL:company>Company</> &V1& does not show a book value for the
specified key date for supplier &V2&.

System Response

Informative message.
The programm interprets this as a realization of the
<GL:intercompany_profit_and_loss>intercompany profit or loss</> in the
prior period due to group inventory sales.

How to fix this error?

If inventories exist on the above mentioned key date at company &V1&,
maintain them using the manual Table Data Entry.

Error message extract from SAP system. Copyright SAP SE.