Material document & does not include an accounting document

What causes this issue?

The system cannot find an
<DS:GLOS.3526B7FCAFAB52B9E10000009B38F974>accounting document</> for
the <DS:GLOS.3526C023AFAB52B9E10000009B38F974>material document</> &V1&
.
Possible reasons for this are:
The goods movement has no relevance to accounting. Therefore, the
system did not generate an accounting document for the material
document.
The material document is a document that was posted before Release 2.1.
Such documents must be converted so that the system can find the
relevant accounting document.
The procedure for the
<DS:GLOS.0F3E2A820E21D311B60F0060B03C2BFF>subsequent calculation of
value</> is not active in your system. For further information, refer
to the documentation on the program for valuating goods movements:
<DS:RE.RM07MWBU>RM07MWBU</>.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Choose <LS>Continue</> and then choose another function.
Find out when the material document was created. If the document was
created prior to the Release changeover, ask your system administrator
to carry out the conversion of the documents. The individual steps
required for document conversion are described in the Release Notes for
Release 2.1B.

Error message extract from SAP system. Copyright SAP SE.