Customize Trait Doctrine Mappings with AttributeOverride

User.php

<?php

namespace MyBundle\Entity;

use Doctrine\ORM\Mapping AS ORM;

/**
 * @ORM\Entity
 * @ORM\AttributeOverrides({
 *  @ORM\AttributeOverride(name="id", column=@ORM\Column(name="table_id"))
 * })
 */
class User
{
    use UserTrait;
}

UserTrait.php

<?php

namespace MyBundle\Entity;

use Doctrine\ORM\Mapping AS ORM;

trait UserTrait
{
    /**
     * @ORM\Column(type="integer")
     */
    private $id;
}