Make no postings to the default funds center in the FM area

What causes this issue?

The default funds center automatically receives all posting data which
could not be assigned to a funds center when a posting was made. This
is the case, for example, for payments without clearing, because the
Financial Accounting coding block which contains the funds center,
commitment item, and fund, will not run. You cannot post directly to
the default funds center.

System Response

Function not carried out.

How to fix this error?

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

Error message extract from SAP system. Copyright SAP SE.