Apex domains cannot have CNAME records.
Question and response
Question
dig bahr-pflege.org. NS
Answer
bahr-pflege.org. 5 NS ns-455.awsdns-56.com.
bahr-pflege.org. 5 NS ns-1065.awsdns-05.org.
bahr-pflege.org. 5 NS ns-600.awsdns-11.net.
bahr-pflege.org. 5 NS ns-1675.awsdns-17.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0