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+Problem:
+status 500
+occ upgrade gives database error
+
+Solution:
+```sql
+set global innodb_default_row_format=dynamic;
+set global default_storage_engine=InnoDB;
+set global innodb_file_format = BARRACUDA;
+```
+
+```
+sudo -u http php /usr/share/webapps/nextcloud/occ -vvv upgrade
+```