Cannot change the purchasing info record; vendor is blocked

What causes this issue?

You want to display or change a purchasing info record for the vendor.
The master data for the vendor may include personal data and is blocked.

System Response

To protect personal data, the system does not display the purchasing
info record for the vendor and you cannot change the data for this
vendor.

How to fix this error?

If you are sure that you want to display or change the purchasing info
record for the vendor, use transaction
<DS><DS:TRAN.BUP_REQ_UNBLK>BUP_REQ_UNBLK</></> to request unblocking.

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.