Symfony无法执行Doctrine Schema更新

我遇到了运行doctrine:schema:update --force的问题,原因是forgeign键约束问题.

 [Doctrine\DBAL\DBALException] An exception occurred while executing 'ALTER TABLE Product ADD CONSTRAINT FK_1CF73D312ADD6D8C FOREIGN KEY (supplier_id) REFERENCES Supplier (id) ON DELETE SET NULL':                                                                                                                   

 SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (`wic_dev`.`#sql-5c0 a_1a12`, CONSTRAINT `FK_1CF73D312ADD6D8C` FOREIGN KEY (`supplier_id`) REFERENCES `Supplier` (`id`) ON DELETE SET NULL)                        

 [PDOException] SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (`wic_dev`.`#sql-5c0 a_1a12`, CONSTRAINT `FK_1CF73D312ADD6D8C` FOREIGN KEY (`supplier_id`) REFERENCES `Supplier` (`id`) ON DELETE SET NULL)

我有两个表创建此错误:产品和供应商.

产品可以有1个供应商,供应商可以有很多产品.

以下是我设置实体的方法:

产品实体:

 /**
 * @ORM\ManyToOne(targetEntity="WIC\SupplierBundle\Entity\Supplier", inversedBy="products", fetch="EAGER")
 * @ORM\JoinColumn(name="supplier_id", referencedColumnName="id", nullable=true, onDelete="SET NULL")
 * @Common\Versioned
 * @Assert\NotBlank(message="Supplier Cannot Be Blank")
 */
protected $supplier;

供应商实体

 /**
 * @ORM\OneToMany(targetEntity="WIC\ProductBundle\Entity\Product", mappedBy="supplier", cascade={"all"})
 */
protected $products;

我目前在每个表中都有数据.我知道有些产品缺少供应商,供应商缺少产品.

我做错了什么,如何解决这个问题？我需要运行此架构更新,以便我的其他表也将更新.

非常感谢你的帮助!