Not possible to determine a condition type

What causes this issue?

The system was not able to find a <GL:condition_type>condition type</>
for the item. Price determination is therefore not possible.

How to fix this error?

Contact your system administrator.
The latter can maintain the calculation schema assigned to the
purchasing document using the Implementation Guide (IMG):
<DS:SIMG.SIMG_CFMENUOLMEOMER5>Define calculation schema</>

Error message extract from SAP system. Copyright SAP SE.