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Plesk pre-migration error

Plesk pre-migration check finishes with an error:

Set variable innodb_strict_mode to OFF on target to avoid the migration errors

Strict mode is enabled on the newer versions of MySQL/MariaDB by default.

The my.cnf file needs to be edited. The following is applicable to a Plesk installation on Unbuntu. You will need root access to the server, otherwise contact your hosting provider.

  1. Connect to the server using Filezilla via SSH using the root login details.
  2. Navigate to /etc/mysql/my.cnf
  3. OPen my.cnf with a text editor.
  4. Add innodb_strict_mode=OFF under the [mysqld] section.
  5. Save the changes and close the file.
  6. Use Putty to log into the server with the root login details to restart the MySql service.
# service mysql restart || service mariadb restart || service mysqld restart

Migration can now continue. Once finished, re-edit the file to remove the change.