SQL Integrity constraint violation problem

Hi,

We’ve upgraded from 2 to 3 and we keep getting this error – truncated for clarity. Looks like it only happens with 3.0 activates. We have the latest version of WordPress installed.

Fatal error: Uncaught Exception: SQLSTATE[23000]: Integrity constraint violation: 1052 Column ’email’ in field list is ambiguous in /var/www/wristwatchreview.com/wp-content/plugins/mailpoet/lib/Models/Model.php