Multiple DMARC Records Error for mailchimp

I have two DMARC Records which one should I delete

The one that you don’t want to use. :wink:

Only you can decide which one you want to use.

Neither policy is configured in a manner that will protect your domain against spoofing, but the second is at least configured to send reports somewhere. As long as the rua goes to a DMARC monitoring service that you will use to view the aggregate data, that would be the better of the two.