Apex domains cannot have CNAME records.
Question and response
Question
dig sdnp.org.mw. NS
Answer
sdnp.org.mw. 2 NS pch1.nic.mw.
sdnp.org.mw. 2 NS rip.psg.com.
sdnp.org.mw. 2 NS mw.cctld.authdns.ripe.net.
sdnp.org.mw. 2 NS chambo.sdnp.org.mw.
sdnp.org.mw. 2 NS nyala.sdnp.org.mw.
sdnp.org.mw. 2 NS domwe.sdn.mw.
Authority
The response has no authority records.
Additional
rip.psg.com. 2 A 147.28.0.39
pch1.nic.mw. 172791 A 204.61.216.131
domwe.sdn.mw. 172791 A 41.87.5.162
domwe.sdn.mw. 172791 A 196.45.190.9
chambo.sdnp.org.mw. 172797 A 102.219.183.67
chambo.sdnp.org.mw. 172797 A 196.45.188.5
rip.psg.com. 2 AAAA 2001:418:1:0:0:0:0:39
pch1.nic.mw. 172791 AAAA 2001:500:14:6131:ad:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0