Account type not valid; see long text & & &

What causes this issue?

There is an account type in the parked document which does not exist.
There is therefore a termination.

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?

If you can reproduce the problem, report it to SAP and ask for the
problem to be forwarded directly to development support or development.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.