WBS element & is not an account assignment element

What causes this issue?

Because the WBS element &V1& is not defined as an
<GL:account_assignment_element>account assignment element</>, you
cannot make any actual or commitment postings.

System Response

INCLUDE 'NA_ALLG_NOVERARBEITUNG' OBJECT DOKU ID TX

How to fix this error?

You can correct this by entering a WBS element that is defined as an
account assignment element.
If you want to post to WBS element &V1& then you must first get it
changed into an account assignment element by the system administrator
or other authorized person such as the project manager.
Procedure for system administrator:
Set the account assignment indicator for the WBS element &V1&.

Error message extract from SAP system. Copyright SAP SE.