I receive the error below during the upgrade process. I restored to previous backup and tried again and received the same. Any ideas what exactly is it indicating is duplicate? Thanks so much!
[Error: Migrate Settings to 4.7.alpha1] Error Field Error Value Type DB_Error Code -5 Message DB Error: already exists Mode 16 UserInfo ALTER TABLE civicrm_setting ADD UNIQUE INDEX index_domain_contact_name (domain_id, contact_id, name) [nativecode=1062 ** Duplicate entry '1-571-activity_tab_filter' for key 'index_domain_contact_name'] DebugInfo ALTER TABLE civicrm_setting ADD UNIQUE INDEX index_domain_contact_name (domain_id, contact_id, name) [nativecode=1062 ** Duplicate entry '1-571-activity_tab_filter' for key 'index_domain_contact_name']