dbal: Problem with doctrine diff

Hi,

When i use the doctrine diff, doctrine create a file with this line :

<?php declare(strict_types = 1);

namespace DoctrineMigrations;

use Doctrine\DBAL\Migrations\AbstractMigration;
use Doctrine\DBAL\Schema\Schema;

/**
 * Auto-generated Migration: Please modify to your needs!
 */
class Version20180129135625 extends AbstractMigration
{
    public function up(Schema $schema)
    {
        // this up() migration is auto-generated, please modify it to your needs
        $this->abortIf($this->connection->getDatabasePlatform()->getName() !== 'mysql', 'Migration can only be executed safely on \'mysql\'.');

        $this->addSql('ALTER TABLE address CHANGE complement complement VARCHAR(255) DEFAULT NULL');
    }

    public function down(Schema $schema)
    {
        // this down() migration is auto-generated, please modify it to your needs
        $this->abortIf($this->connection->getDatabasePlatform()->getName() !== 'mysql', 'Migration can only be executed safely on \'mysql\'.');

        $this->addSql('ALTER TABLE address CHANGE complement complement VARCHAR(255) DEFAULT \'NULL\' COLLATE utf8_unicode_ci');
    }
}

I use Symfony 4, with php 7 and MariaDB from latest version.

My mapping is

App\Entity\Address:
  type: entity
  repositoryClass: App\Repository\AddressRepository
  indexes:
    uuid_index:
      columns: [ uuid ]
  id:
    id:
      type: integer
      generator: {strategy: AUTO}
  fields:
    uuid:
      type: uuid
      unique: true
    name:
      type: string
      length: 100
    address:
      type: string
      length: 255
    complement:
      type: string
      nullable: true
      length: 255
    postcode:
      type: string
      length: 100
    city:
      type: string
      length: 100
    deleted:
      type: boolean
    createdAt:
      type: datetime
      gedmo:
        timestampable:
          on: create
    updatedAt:
      type: datetime
      gedmo:
        timestampable:
          on: update

when i use very verbose on my command, doctrine create this request :

CREATE TABLE address (
id INT AUTO_INCREMENT NOT NULL, 
uuid CHAR(36) NOT NULL COMMENT '(DC2Type:uuid)', 
name VARCHAR(100) NOT NULL, 
address VARCHAR(255) NOT NULL, 
complement VARCHAR(255) DEFAULT NULL, 
postcode VARCHAR(100) NOT NULL, 
city VARCHAR(100) NOT NULL, 
deleted TINYINT(1) NOT NULL, 
created_at DATETIME NOT NULL, 
updated_at DATETIME NOT NULL, 
UNIQUE INDEX UNIQ_D4E6F81D17F50A6 (uuid),
 INDEX uuid_index (uuid), 
PRIMARY KEY(id)
) DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci ENGINE = InnoDB

When i use PMA to export my table :

DROP TABLE IF EXISTS `address`;
CREATE TABLE IF NOT EXISTS `address` (
`id` int(11) NOT NULL,
  `uuid` char(36) COLLATE utf8_unicode_ci NOT NULL COMMENT '(DC2Type:uuid)',
  `name` varchar(100) COLLATE utf8_unicode_ci NOT NULL,
  `address` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
  `complement` varchar(255) COLLATE utf8_unicode_ci DEFAULT NULL,
  `postcode` varchar(100) COLLATE utf8_unicode_ci NOT NULL,
  `city` varchar(100) COLLATE utf8_unicode_ci NOT NULL,
  `deleted` tinyint(1) NOT NULL,
  `created_at` datetime NOT NULL,
  `updated_at` datetime NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

So the problem is not on my server i think…