Apex domains cannot have CNAME records.
Question and response
Question
dig solo.citra.net.id. NS
Answer
solo.citra.net.id. 5 NS ns1.solo.citra.net.id.
solo.citra.net.id. 5 NS ns2.solo.citra.net.id.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0