IBAN &1 is not a correct QR-IBAN number, only CH/LI IBAN is allowed

What causes this issue?

The IBAN number you have entered is not a correct QR-IBAN number that
you can use for payments in Switzerland or Liechtenstein.

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?

QR-IBANs are special IBAN numbers: they must contain the CH or LI
country code, followed by two digits, then the QR-IID (bank identifier)
from the 30.000 - 31.999 number range, and then the rest of the IBAN
number.
Please enter the correct QR-IBAN number.
If regular IBAN is provided in the QR-IBAN field then this IBAN should
be used for payments in Switzerland or Lichtenstein.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.