Cost center &/& blocked against direct postings on &

What causes this issue?

Cost center &V2&, controlling area &V1& is locked for primary postings
on &V3&. The SAP System automatically determined controlling area &V1&
from the company code (and business area).

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?

Remove the lock for primary postings in the cost center master.
Or, assign the account to another cost center, order, or project.

Error message extract from SAP system. Copyright SAP SE.