I am running a Nextcloud installation on Openmediavault. When upgrading from version 15 on 16 there were errors when adjusting the MySQL / MariaDB. Especially with the Contacts CardDav app. The prefix length of 760 bytes was reached, because innodb-large-prefix was not activated. The error message in detail:Nextcloud: maximum column size is 767 bytes After a little research, the solution was quickly found. However, I have diversewp-admin / admin.php?I saw page = dsgvoaio-free-settings-pageene approaches and with some I was not quite there. In the end, I decided on the following approach, since it requires little intervention in the system, is conveniently controlled via a conf and no complex SQL statements are necessary. As can be seen from previous articles, I run Nextcloud with a MySQL[…]