I mistakenly clicked on enable DNSsec.My registrar does not support DNSsec. I clicked to disable DNSsec.
I cannot disable DNSsec, because after disabling the records, DNSsec record is not deleted(DNSKEY and etc). Some users can not access the site. I deleted the domain from my account, then I added the domain again, but DNSsec records were not deleted.
Please Make the removal of DNSSec record when you click to disable DNSSec!