无法使用Ebean在Play中创建基本模型类

我正在尝试使用Ebean在Play中创建以下类：

public class BaseModel extends Model {

    @Column(name = "created_at")
    public Date createdAt;

    @Column(name = "updated_at")
    public Date updatedAt;

    @PrePersist
    public void createdAt() {
        this.createdAt = this.updatedAt = new Date();
    }

    @PreUpdate
    public void updatedAt() {
        this.updatedAt = new Date();
    }

}

它可以很好地编译，但是当我使用实体bean子类化此类时（因此它们每个都将插入时间戳以进行创建和更新），当尝试点击该应用程序时，我得到了以下异常：

play.api.UnexpectedException: Unexpected exception[PersistenceException: Error with [models.InventoryItem] I believe it is not enhanced but it's superClass [class models.BaseModel] is? (You are not allowed to mix enhancement in a single inheritance hierarchy)]
        at play.core.ReloadableApplication$$anonfun$get$1$$anonfun$apply$1$$anonfun$1.apply(ApplicationProvider.scala:150) ~[play_2.10.jar:2.1.4]
        at play.core.ReloadableApplication$$anonfun$get$1$$anonfun$apply$1$$anonfun$1.apply(ApplicationProvider.scala:114) ~[play_2.10.jar:2.1.4]
        at scala.Option.map(Option.scala:145) ~[scala-library.jar:na]
        at play.core.ReloadableApplication$$anonfun$get$1$$anonfun$apply$1.apply(ApplicationProvider.scala:114) ~[play_2.10.jar:2.1.4]
        at play.core.ReloadableApplication$$anonfun$get$1$$anonfun$apply$1.apply(ApplicationProvider.scala:112) ~[play_2.10.jar:2.1.4]
        at scala.util.Either$RightProjection.flatMap(Either.scala:523) ~[scala-library.jar:na]
Caused by: javax.persistence.PersistenceException: Error with [models.InventoryItem] I believe it is not enhanced but it's superClass [class models.BaseModel] is? (You are not allowed to mix enhancement in a single inheritance hierarchy)
        at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.setBeanReflect(BeanDescriptorManager.java:1374) ~[avaje-ebeanorm-server.jar:na]
        at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.createByteCode(BeanDescriptorManager.java:1142) ~[avaje-ebeanorm-server.jar:na]
        at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.readDeployAssociations(BeanDescriptorManager.java:1058) ~[avaje-ebeanorm-server.jar:na]
        at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.readEntityDeploymentAssociations(BeanDescriptorManager.java:565) ~[avaje-ebeanorm-server.jar:na]
        at com.avaje.ebeaninternal.server.deploy.BeanDescriptorManager.deploy(BeanDescriptorManager.java:252) ~[avaje-ebeanorm-server.jar:na]
        at com.avaje.ebeaninternal.server.core.InternalConfiguration.<init>(InternalConfiguration.java:124) ~[avaje-ebeanorm-server.jar:na]