Looks like your nameservers do not agree on the SOA serial

hi,
i runn DA for years on 2 servers....
1 server for www 2nd server for email
this is the first time i have any issues with dns

i see this error when checkind dns

Looks like your nameservers do not agree on the SOA serial. Ths SOA records as reported by your nameservers:
84.22.113.69 -> 2019011105
46.19.34.196 -> 2019011106

Can anybody help me figrue this out?