Unique index or primary key violation in H2 create-drop mode

I have 3 tables as course, paper & course_paper in a H2 database with create-drop option configured in application.properties. whenever I try to insert data to tables by data.sql I am getting Unique index or primary key violation. Below are my entity class with relationship annotation & data.sql. Please provide some solution or guide me to resolve this issue.

1 : BaseEntity

@MappedSuperclass
@AllArgsConstructor
@NoArgsConstructor
@Getter
@Setter
public class BaseEntity implements Serializable {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;
}

2 : CourseEntity

@Entity
@Table(
        name = "course",
        uniqueConstraints = {
                @UniqueConstraint(columnNames = "id")
        }
)

@NoArgsConstructor
@AllArgsConstructor
@Setter
@Getter
public class CourseEntity extends BaseEntity {

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

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

    @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER)
    @JoinTable(name = "course_paper", joinColumns = {@JoinColumn(name = "course_id", referencedColumnName = "id")}, inverseJoinColumns = {@JoinColumn(name = "paper_id", referencedColumnName = "id")})
    private Set<PaperEntity> paperEntities;

    public CourseEntity(Course course) {
        this.setId(course.getId());
        this.setName(course.getName());
        this.setStream(course.getStream());
    }
}

3 : PaperEntity

@Entity
@Table(name = "paper",
        uniqueConstraints = {
                @UniqueConstraint(columnNames = "id")
        })
@AllArgsConstructor
@NoArgsConstructor
@Getter
@Setter
public class PaperEntity extends BaseEntity {

    @Column(name = "name")
    private String name;
    @Column(name = "symbolic_name")
    private String symbolicName;
 
    public PaperEntity(Paper paper){
        this.setId(paper.getId());
        this.setName(paper.getName());
        this.setSymbolicName(paper.getSymbolicName());
    }
}

4 : data.sql

INSERT INTO `course` VALUES (1,'ARTS','+2 1St Year'),(2,'ARTS','+2 2nd Year'),(3,'ARTS','+3 1St Year'),(4,'ARTS','+3 2nd Year'),(5,'ARTS','+3 3rd Year'),(6,'SCIENCE','+2 1St Year'),(7,'SCIENCE','+2 2nd Year'),(8,'SCIENCE','+3 1St Year'),(9,'SCIENCE','+3 2nd Year'),(10,'SCIENCE','+3 3rd Year');
INSERT INTO `paper` VALUES (1,'Pol.Science','Political Science'),(2,'Eco','Economics'),(3,'Math','Mathematics'),(4,'Phy','Physics'),(5,'Chem','Chemestry');
INSERT INTO `course_paper` VALUES(1,1),(1,2),(2,1),(2,2);

5 : Error :

Caused by: org.h2.jdbc.JdbcSQLIntegrityConstraintViolationException: Unique index or primary key violation: "PUBLIC.UK_HU9K94I7MTNKS4X0Y0207JBGG_INDEX_2 ON PUBLIC.COURSE_PAPER(PAPER_ID) VALUES 1"; SQL statement:
INSERT INTO `course_paper` VALUES(1,1),(1,2),(2,1),(2,2)