Apex domains cannot have CNAME records.
Question and response
Question
dig latvijastikli.lv. NS
Answer
latvijastikli.lv. 5 NS bruce.ns.cloudflare.com.
latvijastikli.lv. 5 NS janet.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0