schema-tool:update: foreign key VARCHAR(255) instead of INT(11)

Annotations:

class Stock extends Model {
    /** @ORM\ManyToOne(targetEntity="Unit") */
    protected $unit;
    // ...
}

class Unit extends Model
{

    /** @ORM\Column(type="string") */
    protected $title;

    /** @ORM\ManyToOne(targetEntity="\Application\Entity\Supplier") */
    protected $supplier;
    // ...
}

class Model
{
    /**
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;
    // ...
}

And then:

> orm:schema-tool:update --dump-sql
ALTER TABLE SupplierStock CHANGE unit_id unit_id VARCHAR(255) NOT NULL;

And I got a error because of Unit Id has int(11) type: [HY000][1215] Cannot add foreign key constraint

Previously schema was generated by schema-tool too and unit_id column type was INT(11). So I think problem appeared in latest versions.

[forever@local 21:39:32 ppc-main]$ composer info | grep doctrine
You are running composer with xdebug enabled. This has a major impact on runtime performance. See https://getcomposer.org/xdebug
doctrine/annotations                v1.2.7              Docblock Annotations Parser
doctrine/cache                      v1.6.0              Caching library offering an object-oriented API for many     cache backends
doctrine/collections                v1.3.0              Collections Abstraction library
doctrine/common                     v2.4.3              Common Library for Doctrine projects
doctrine/dbal                       v2.5.4              Database Abstraction Layer 
doctrine/doctrine-module            0.10.0              Zend Framework 2 Module that provides Doctrine basic functionality required for ORM and ODM modules
doctrine/doctrine-orm-module        0.9.1               Zend Framework 2 Module that provides Doctrine ORM functionality
doctrine/inflector                  v1.1.0              Common String Manipulations with regard to casing and singular/plural rules.
doctrine/instantiator               1.0.5               A small, lightweight utility to instantiate objects in PHP without invoking their constructors
doctrine/lexer                      v1.0.1              Base library for a lexer that can be used in Top-Down, Recursive Descent Parsers.
doctrine/orm                        v2.4.8              Object-Relational-Mapper for PHP
gedmo/doctrine-extensions           v2.4.13             Doctrine2 behavioral extensions
slm/queue-doctrine                  v0.4.1              Zend Framework 2 module that integrates Doctrine as queuing system

doctrine / orm

schema-tool:update: foreign key VARCHAR(255) instead of INT(11) #5880