Project number or WBS number may not be used

What causes this issue?

The key you entered for a project definition or WBS element is not
valid according to the settings in Customizing.

System Response

INCLUDE 'NA_ALLG_NOFUNKTION' OBJECT DOKU ID TX

How to fix this error?

Check the key entered and the Customizing settings. If the <ls>edit</>
has been set, you must enter a project code that corresponds with the
current coding mask.
<DS:CHAP.SIMG_CMMENUOLPRS010>Project number editing</>

Error message extract from SAP system. Copyright SAP SE.