Add the validation record shown below to identify the cause.
* Unless the zone is reflected, it will not be referenced from an external source. When the validation is completed, delete the validation record from the relevant zone before reflecting the updated zone information.

test.Contract Zone Name.    IN TXT    "test"

If you can add the record, there is a problem with the registration content of the record you cannot add or change. Check the error displayed on the screen in "List of Error Messages," and then review the registration content.

If you cannot add the record, a record in an invalid state (for example, RFC violation) may exist in the zone. Check the content of the zone and modify or delete the problematic record.

If multiple records in an invalid state exist in the relevant DNS record, they cannot be edited individually. Obtain the zone file from "Download a Zone File," and then update the zone information in "Upload a Zone File" after taking the following action.

• Modify or delete the relevant record in the zone file.
• Increase the number of the serial value of the SOA record by 1 or more.
  • Unless the SOA record is specified as an import target in "Advanced Settings" at the time of upload, the serial value is incremented automatically.