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Kindly edit your first post and submit the site FTP and admin details for Mods/Admin.
Also, let us know which on which ad and zone you are facing this error with page URL.
so we can test the same on your site to replicate this issue.
You can't have two affiliate ads in the same zone on rotation. Rotation script require some JS code that prevent affiliate code to work in rotation. That way is the issue. Better have two separate zones and display them separately.