Was will mir diese Fehlermeldung sagen?

[Birden]

Was will mir diese Fehlermeldung sagen?

[2018-08-15 15:48:20] request.INFO: Matched route "contao_install". {"route":"contao_install","route_parameters":{"_scope":"backend","_token_check":true,"_controller":"Contao\\InstallationBundle\\Controller\\InstallationController::installAction","_route":"contao_install"},"request_uri":"https://domain.de/contao/install","method":"POST"} []
[2018-08-15 15:48:21] app.CRITICAL: An exception occurred. {"exception":"[object] (Doctrine\\DBAL\\Exception\\DriverException(code: 0): An exception occurred while executing 'ALTER TABLE tl_search CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci':\n\nSQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes at /www/htdocs/w01eq129n/merkel/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/AbstractMySQLDriver.php:126, Doctrine\\DBAL\\Driver\\PDOException(code: 42000): SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes at /www/htdocs/w01eq129n/merkel/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:109, PDOException(code: 42000): SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes at /www/htdocs/w01eq129n/merkel/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:107)"} []

Die Meldung kommt, nachdem ich nach dem Update im Installtool die DB aktualisieren will. Das Frontend ist nicht erreichbar.

[Spooky]

Versuche mal die Tabelle tl_search ganz zu löschen und öffne das Contao Install Tool danach nochmal.

[Birden]

Danke, das hat gehülft!