Key rotate when upgrading from 13.5.3 (16 => 32 characters)

we’re struggling with the upgrade of Gitlab from 13.5.3 to more recent versions due to using a secret key with too little characters (16 instead of 32).

As we use existing infrastructure which is heavily reliant on runners to work and we’re not able to set a padded key due to errors when decrypting CI/CD variables it has become increasingly difficult for us to upgrade Gitlab if not impossible at this moment.

Do you know when the following tasks will be tackled or how to work around these tasks and implement a separate key-rotate functionality?

It would be great if somebody could help us out here.