Steps to reproduce:

1. Edit Dashboard
2. Add Page
3. Insert Name
4. Apply
5.  Save Changes

Result:

• Error in query [INSERT INTO dashboard_page (dashboard_pageid,dashboardid,name,display_period,sortorder) VALUES ('1872','168','A','0','1')] [Duplicate entry '1872' for key 'PRIMARY'] [zabbix.php:22 → require_once() → ZBase->run() → ZBase->processRequest() → CController->run() → CControllerDashboardUpdate->doAction() → CApiWrapper->__call() → CFrontendApiWrapper->callMethod() → CApiWrapper->callMethod() → CFrontendApiWrapper->callClientMethod() → CLocalApiClient->callMethod() → CDashboard->update() → CDashboardGeneral->updatePages() → DB::insert() → DB::insertBatch() → DBexecute() → trigger_error() in include/db.inc.php:367]
• SQL statement execution has failed "INSERT INTO dashboard_page (dashboard_pageid,dashboardid,name,display_period,sortorder) VALUES ('1872','168','A','0','1')".