How to redirect traffic between subdomains if one doesn't have a valid certificate?

Question

I had an issue with a Kubernetes cluster that made the letsecrypt reach the certificate limit for a week in one of our subdomains. I created a temporary new subdomain for the service but I would like to redirect the traffic to avoid changing the URL in all other services.

Basically I would like that whenever accessing staging.domain.com (the one that is not working), traffic would be redirected to something like staging2.domain.com. Is this possible with ingress or do I need a valid certificate for both domains?

spec:
  rules:
  - host: staging.domain.com
    http:
      paths:
      - backend:
          service:
            name: staging-service
            port:
              number: 80
        path: /*
        pathType: ImplementationSpecific
  - host: staging2.domain.com
    http:
      paths:
      - backend:
          service:
            name: staging-service
            port:
              number: 80
        path: /
        pathType: ImplementationSpecific
  tls:
  - hosts:
    - staging2.domain.com
    secretName: letsencrypt-staging-service