Key value has incorrect checksum for the encryption key

What causes this issue?

The presented key value has an incorrect checksum.

System Response

The key cannot be imported.

How to fix this error?

Check that you have entered the correct value for the key material. This
error is likely caused by a typing error.

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.