If you enabled the automatic pausing and replacement of loser ads, Adalysis will create new ads using your draft ads when it attempts to replace a losing ad.

If the automated creation of new ads fail for any reason, you will need to modify the draft ad that Adalysis attempted to use to create the new Ad (If the draft ad was the cause of new ad rejection).   You will see an alert on your dashboard as a result (Audit Alerts / Ads tab):

Clicking on the alert displayed in your dashboard you’ll be able to review the list of adgroups that failed automatic replacement of loser ads.