@JdbcTypeCode issue with Hibernate 6.x version

I am currently using Hibernate 6.4.4 version, along with spanner-hibernate-dialect 3.3.0 version and google-cloud-spanner-jdbc 2.16.1 version. But still facing the below error as: org.springframework.dao.InvalidDataAccessApiUsageException: Could not deserialize string to java type: JsonJavaType(model.Template)

@Column(name="TemplateObj")
@JdbcTypeCode( SqlTypes.JSON )
private Template template;

Below is the model class of Template

@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class Template {
    private String id;
    private String vendor;
    private String acc;
    private String schemaVersion;
    private String icon;
    private String type;
    private Descriptor descriptor;
    private DetailTemplate detailTemplate;
    private String accountId;
    private Boolean hasAccount;
    private Boolean canTestConnection;
    private String dataSourceType;
    private Boolean runNowSupported;
}

@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class Descriptor {
    private String displayName;
    private String description;
    private String docRef;
}

@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class DetailTemplate {
    private String type;
    private Descriptor descriptor;
    @NotEmpty(message = "{detailTemplate.properties.required}")
    private List<Property> properties;
}

@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class Property {
    private String id;
    private boolean required;
    private boolean disabled;
    private String validation;
    private String default_value;
    private String type;
    private Descriptor descriptor;
    private List<Option> options;
    private DependsOn depends_on;
    private boolean secret;
    private boolean disableOnEdit;
    private Integer minDays;
    private String helperText;
}

@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class Option {
    private String id;
    private String displayName;
}

@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class DependsOn {
    private String field;
    private String value;
}

Below is sample data of TemplateObj column which is to be stored in Spanner DB

  {
  "canTestConnection": true,
  "detailTemplate": {
    "properties": [
      {
        "descriptor": {
          "description": "Select multiple regions",
          "displayName": "Region",
          "docRef": "https://guide.com"
        },
        "id": "region",
        "options": [
          {
            "displayName": "us-east",
            "id": "us-east"
          },
          {
            "displayName": "canada",
            "id": "canada"
          }
        ],
        "required": true,
        "type": "multi-select"
      }
    ]
  },
  "descriptor": {
    "description": "Sample",
    "displayName": "Test Name",
    "docRef": "https://guide.com"
  },
  "hasAccount": true,
  "icon": "http://svg_link",
  "id": "abc",
  "schemaVersion": "1.0",
  "type": "xyz",
  "vendor": "Test"
}

I have also defined as below in my application.yaml file

spring:
  jpa:
    properties:
      hibernate:
        dialect: com.google.cloud.spanner.hibernate.SpannerDialect

We were using @Type(type = "com.google.cloud.spanner.hibernate.types.SpannerJsonType") before while using hibernate 5.x version, but seems now just don't understand why the spanner custom column types is not there for json object

Any suggestions? I want to store the java object in json format.