Records of the same name and type must always have the same TTL value.

Symptoms

You are attempting to edit or insert a new DNS record when the system returns an error resembling the following:

domain.tld's “MX” records have mismatched TTL values (14400 and 300). Records of the same name and type must always have the same TTL value.

Description 

This will occur if you are adding a record to a zone that already contains similar types (A records, CNAME records, TXT records, or MX records, for example) with already defined TTL values. If you are adding a zone with a different TTL value, the error will appear.

Workaround

Ensure that all records of the same type share the same TTL values. For example, if an MX record exists with a TTL of 14400, all MX records in the zone must share that TTL value.