− | For any upgrade, please see the eHour documentation/wiki. Especially if there is an database schema update. So always make a backup of your mysql database before starting any upgrade. | + | For any upgrade, please see the [https://wiki.ehour.nl/display/DOCU/Upgrading+MySQL eHour documentation/wiki]. Especially if there is an database schema update. So always make a backup of your mysql database before starting any upgrade. |