sorry i currently have ACR & container app in my azure account with current domain from azure and now need to add custom subdomain behind cloudflare, as far as i test:

• when i tried to add using A record and add into my cloudflare it failed when validate
• when test using cname its working to validate but it failed when add “failed to add hostname . Failed to provision revision for container app ”. Error details: The following field(s) are either invalid or missing. Field ‘template.revisionsuffix’ is invalid with details: ‘Invalid value: “updateimage20240906-1″: revision with suffix updateimage20240906-1 already exists.’;..”
  For above cname error when add is it due i need to generate my own cert from cloudflare and add into my azure container app ? as ATM i tested only with managed certificate
  If i using cname i cant enabled the proxied of from my cloudflare account if i want to make it works for proxied what should i set as from what i test in my container app the ip not change (after i stop/revision image)

Is there any best practice for this config of container app behind Cloudflare and above error ?

Thank you