'Browser Cache TTL setting' API: which value to use for 'respect existing headers'?

[christoph.kutzinski]

Hey,
in the Cloudflare UI, I can see the option ‘respect existing headers’ in the Browser Cache TTL setting in the Caching tab.
However in the API, this option is not listed as a valid value?
https://api.cloudflare.com/#zone-settings-change-browser-cache-ttl-setting

[sdayman]

Try 0. I know it’s not listed, but I just set to Respect and checked my Audit Log and it showed a value of 0 was entered.