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Sorry to hear you’re facing problems 
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Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can 
Nextcloud version (17.0.2.1):
Operating system and version (Webhoster unkown):
Apache or nginx version ( Apache 2.4.2):
PHP version (eg, 7.2.31):
The issue you are facing:
Problem with the update
When trying to update the system from version 17 to 18, I get the following error message during the webbase update
Doctrine\DBAL\Schema\SchemaException: The table with name ‘db_nextcloud.oc_direct_edit’ already exists.
I have not found an entry for this error message in the forum.
Unfortunately I have no access to SSH.
Is this the first time you’ve seen this error? (Y/N): Yes
Steps to replicate it:
The output of your Nextcloud log in Admin > Logging:
PASTE HERE
Detaillierte Protokollmeldungen
Update vorbereiten
Log-Level auf "debug" gesetzt
Wartungsmodus eingeschaltet
Reparaturschritt: Repair MySQL collation
Reparaturinformation: All tables already have the correct collation -> nothing to do
Reparaturschritt: Repair SQLite autoincrement
Reparaturschritt: Copy data from accounts table when migrating from ownCloud
Reparaturschritt: Drop account terms table when migrating from ownCloud
Das Datenbankschema wird aktualisiert
Doctrine\DBAL\Schema\SchemaException: The table with name 'db_nextcloud.oc_direct_edit' already exists.
The output of your config.php file in `/path/to/nextcloud` (make sure you remove any identifiable information!):
PASTE HERE
The output of your Apache/nginx/system log in `/var/log/____`:
PASTE HERE