How to fixed error 500 in postman from a post request? – Postgresql

I wonder if anyone got an insights regarding this error I got from postman below:

{
    "timestamp": "2022-12-29T07:59:00.313+0000",
    "status": 500,
    "error": "Internal Server Error",
    "message": "could not execute statement; SQL [n/a]; nested exception is org.hibernate.exception.SQLGrammarException: could not execute statement",
    "path": "/v1/personal/add"
}

Here is My Controller Class:

PersonalController.java

@PostMapping("/add")
public ResponseEntity <PersonalResponseDto> addPersonalInfo (@RequestBody final PersonalRequestDetailsDto personalRequestDetailsDto){
    PersonalResponseDto dto = personalService.addPersonalInformation(personalRequestDetailsDto);
    return ResponseEntity.ok(dto);
}

Here is My Service Class:

PersonalService.java

public PersonalResponseDto addPersonalInformation(PersonalRequestDetailsDto personalRequestDetailsDto){

       PersonalEntity personalEntity = personalMapper.toEntity(personalRequestDetailsDto);

       PersonalEntity saveInfo = personalRepository.save(personalEntity);

       return personalMapper.toDto(saveInfo);

}

and here is my Entity class:

@Data
@ComponentScan("personal")
@NoArgsConstructor
@Table(name = "student_personal_information")
@Entity
public class PersonalEntity {

    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE)
    @Column(name = "id", nullable = false)
    private Long id;

    @Column(name = "lastname", columnDefinition = "CLOB")
    private String lastname;

    @Column(name = "firstname", columnDefinition = "CLOB")
    private String firstname;

    @Column(name = "middleinitial")
    private String middleinitial;

    @Column(name = "age")
    private Integer age;

    @Column(name = "image")
    private Byte image;

}

I’d appreciate any help as to why I’m getting the above error in postman.

Thank you.

I wanted to add an information that would store to DB but i’m getting an error.

Here is my Request DTO:

@Data
@NoArgsConstructor
@AllArgsConstructor
public class PersonalRequestDetailsDto implements Serializable {


    private static final long serialVersionUID = -7175623352146349491L;


    @NotEmpty
    private String lastname;

    @NotNull
    private String firstname;

    @NotEmpty
    private String middleinitial;

    @NotNull
    private Integer age;

}

Addendum:
Upon the advice of one commenter here, I learned that the main issue herein is my entity under column image.

Here is the error I got:

column "image" is of type bytea but expression is of type smallint Hint: You will need to rewrite or cast the expression.

To ask, what data type exactly should I declare in my entity to address this issue?