Exception when save in a JPA definition with Spring Boot + Spring data JPA

I have a problem with a JPA definition using Spring Boot + Spring Data JPA, I have defined the next entities:

CommerceCnae.java

@Entity
public class CommerceCnae implements Serializable {

    private static final long serialVersionUID = -5071526484444404982L;

    @Id
    private String name;

    @OneToMany( mappedBy = "commerce", cascade = CascadeType.ALL, orphanRemoval = true)
    private List<AddressCnae> addresses;

    @OneToMany( mappedBy = "commerceCategory", cascade = CascadeType.ALL, orphanRemoval = true)
    private List<CategoryCnae> categories;

    /**
     * @return the name
     */
    public String getName() {
        return name;
    }

    /**
     * @param name
     *            the name to set
     */
    public void setName(String name) {
        this.name = name;
    }

    /**
     * @return the addresses
     */
    public List<AddressCnae> getAddresses() {
        return addresses;
    }

    /**
     * @param addresses
     *            the addresses to set
     */
    public void setAddresses(List<AddressCnae> addresses) {
        this.addresses = addresses;
    }

    /**
     * @return the categories
     */
    public List<CategoryCnae> getCategories() {
        return categories;
    }

    /**
     * @param categories
     *            the categories to set
     */
    public void setCategories(List<CategoryCnae> categories) {
        this.categories = categories;
    }

}

CategoryCnae.java

@Entity
public class CategoryCnae implements Serializable {

    /**
     * 
     */
    private static final long serialVersionUID = 3889422753757007724L;
    @Id
    private String id;
    private String description;

    @ManyToOne
    @JoinColumn(name = "name", nullable = false)
    private CommerceCnae commerceCategory;

    /**
     * @return the id
     */
    public String getId() {
        return id;
    }

    /**
     * @param id
     *            the id to set
     */
    public void setId(String id) {
        this.id = id;
    }

    /**
     * @return the description
     */
    public String getDescription() {
        return description;
    }

    /**
     * @param description
     *            the description to set
     */
    public void setDescription(String description) {
        this.description = description;
    }

    /**
     * @return the commerceCategory
     */
    public CommerceCnae getCommerceCategory() {
        return commerceCategory;
    }

    /**
     * @param commerceCategory
     *            the commerceCategory to set
     */
    public void setCommerceCategory(CommerceCnae commerceCategory) {
        this.commerceCategory = commerceCategory;
    }

}

AddressCnae.java

@Entity
public class AddressCnae implements Serializable {
    /**
     * 
     */
    private static final long serialVersionUID = 7387779987115612860L;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long addressCnaeId = 0;

    private String city;
    private String address;

    @ManyToOne
    @JoinColumn(name = "name", nullable = false)
    private CommerceCnae commerce;

    /**
     * @return the city
     */
    public String getCity() {
        return city;
    }

    /**
     * @param city
     *            the city to set
     */
    public void setCity(String city) {
        this.city = city;
    }

    /**
     * @return the address
     */
    public String getAddress() {
        return address;
    }

    /**
     * @param address
     *            the address to set
     */
    public void setAddress(String address) {
        this.address = address;
    }

    @Override
    public boolean equals(Object obj) {
        if ((obj instanceof AddressCnae)) {
            AddressCnae addressCnaeObj = (AddressCnae) obj;
            return (addressCnaeObj.getAddress().equals(this.getAddress()) && addressCnaeObj.getCity().equals(this.city));
        } else {
            return false;

        }
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + this.address.hashCode() + this.city.hashCode();
        return result;
    }

    /**
     * @return the commerce
     */
    public CommerceCnae getCommerce() {
        return commerce;
    }

    /**
     * @param commerce
     *            the commerce to set
     */
    public void setCommerce(CommerceCnae commerce) {
        this.commerce = commerce;
    }

    /**
     * @return the addressCnaeId
     */
    public long getAddressCnaeId() {
        return addressCnaeId;
    }

    /**
     * @param addressCnaeId
     *            the addressCnaeId to set
     */
    public void setAddressCnaeId(long addressCnaeId) {
        this.addressCnaeId = addressCnaeId;
    }

}

And here is my repository:

@Repository
public interface CommerceRepository extends JpaRepository<CommerceCnae, String> {

}

But when save I have the next exception:

2015-04-08 11:22:31.320 DEBUG 18145 --- [nio-8080-exec-1] o.h.engine.jdbc.spi.SqlExceptionHelper   : could not execute statement [n/a]

java.sql.SQLException: Field 'commerce' doesn't have a default value
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:996)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3887)

Is a bi dirrectional relation, and my configuration is the next:

#DATASOURCE CONFIGURATION

spring.datasource.url=jdbc:mysql://XXXXX/somthing
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.username=XXXXX
spring.datasource.password=XXXXX
spring.datasource.continueOnError=false
spring.datasource.max-active=5

#JPA CONFIGURATION
spring.jpa.database-platform=org.hibernate.dialect.MySQL5InnoDBDialect
spring.jpa.generate-ddl=true
spring.jpa.hibernate.hbm2ddl.auto=create-drop

What is wrong?

Thanks for your help!