Java实体插入数据库更改列类型

我从具有持久类“ RELEASE”的Java代码继承（javax.persistence依赖项）

@Entity @Table(name = ""RELEASE"") @Converter(name = "booleanConverter", converterClass = BooleanConverter.class) public class Release implements Serializable {

private static final long serialVersionUID = 1L;

@Id
@Column(updatable = false, unique = true, nullable = false, precision = 22)
private Long id;

@Convert("booleanConverter")
@Column(nullable = false, length = 5)
private Boolean active;

@Column(nullable = false, length = 125)
private String name;

// uni-directional many-to-one association to Service
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "SERVICE_ID", nullable = false)
private Service service;

与getter和setter关联，我必须更改Id列的类型（Long到String），因为现在我发出API请求并获得{key1: "response1, key2 : "response2" , ...}带有字符串的json格式响应。我得到的新型数字类似“ CHG0070132”。

如何更改类型而不丢失旧数据？