From your cdmon control panel, you can modify the IP of A records in bulk. To do this, access the DNS records management you want to modify by clicking on the DNS option in your panel.
On the "DNS Records" screen, select all the A records whose IP you want to modify.
In the "Bulk actions" dropdown, click on Edit selected A records.
Enter the new IP and click on Save changes.
The bulk modification is now complete. You only need to wait for the changes to propagate, which may take approximately 5 minutes.