Trying to replace our old/expiring wildcard SSL Certificate that's also used in our encryption and signing keystores.

When I go into the 4.2 Admin console, select the old SSL Cert -> Devices, click Encryption keystore, it shows one cert. The old on.
I click the box and select "replace"

I then select the new Cert.

I click OK

and get this error:

Error adding one or more certificates to the keystore: The maximum number of keys has already been added to the keystore (~tmp_4806846fa58ab912-encryption).