ns2.iguana.cat has no CNAME records.
Question and response
Question
dig ns2.iguana.cat. NS
Answer
The response has no answer records.
Authority
iguana.cat. 10800 SOA ns1.iguana.cat. sistemes.somvera.cat. 2025101301 10800 3600 648000 38400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0