Selected document cannot be edited

What causes this issue?

The noted document selected cannot be processed since it was entered
using transaction &V1&.

System Response

Error message.

How to fix this error?

Start transaction &V1& and repeat the selection.

Procedure for System Administrators

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.