You cannot post with transaction type & here

What causes this issue?

You have entered a transaction type for write-ups. This is not allowed
in the transaction you have selected.

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?

Either choose <LS>Postings ->Miscellaneous,</> or
enter another transaction type.

Error message extract from SAP system. Copyright SAP SE.