Error code 1315 after choosing a plan to add a domain

Hello,
I’m trying to add my domain to cloudflare after I forgot access to my old cloudflare account and email however I still own the domain and I still have access to the site that i registered the domain from when i try to add the domain after choosing free plan it tells me Refer to https://cfl.re/3VUQyyL for assistance. The zone you are trying to upgrade is marked as Do Not Upgrade. (Code: 1315) hopefully someone knows a solution for this.

regards.

i already created a ticket
#3257208 please take a look on it