Wordpress plugin - Adsense (Google Publisher) - change user?

Question

WordPress

The situation is such that earlier the owner was different and he inserted ads using this plugin, respectively, logging in through his Google account. The owner has changed, a new Google account and there is no way to change ads on the site. Since this plugin (google) after authorization writes "Your AdSense account does not match the account registered for this site. Please contact the site owner."
Tell me please. What are the options?
PS A lot of time has passed and contacts with the previous owner have not been preserved.

Answer 1

Try uninstalling the plugin, then reinstalling it. (Just delete, not disable.)