Fatal error: Declaration of SwagMigrationAssistant\Command\MigrateDataCommand::execute(Symfony\Component\Console\Input\InputInterface $input, Symfony\Component\Console\Output\OutputInterface $output): ?int must be compatible with Symfony\Component\Console\Command\Command::execute(Symfony\Component\Console\Input\InputInterface $input, Symfony\Component\Console\Output\OutputInterface $output): int in /var/www/html/custom/plugins/SwagMigrationAssistant/Command/MigrateDataCommand.php on line 68