Updating error from 19.0.8 to 20.0.7 get this error.

[dovale05]

Doctrine\DBAL\Exception\DriverException: An exception occurred while executing 'ALTER TABLE oc_authtoken CHANGE password_invalid password_invalid TINYINT(1) DEFAULT '0'': SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes

[kesselb]

Thank you for reporting this issue 👍 Please check #15058 for more details.

Usually there are two ways to fix this:

A) Configure your database server to support utf8mb4 (https://docs.nextcloud.com/server/latest/admin_manual/configuration_database/mysql_4byte_support.html).

B) If the database server does not support utf8mb4 disable it by setting 'mysql.utf8mb4' => false in your config.php (emojis in filename, calendar events, etc. are not possible than and you have to accept the warning).