two tables got created in mysql with names blog and blog_seq through spring boot entity annotations

i am new in spring boot and such things, this is the first project i was trying to explore and was following a lecture for project creation, i made an entity class with @entity and @table annotations, when i executed the project, two table in mysql db got created namely blog and blog_seq, i want to understand how this blog_seq got created and what is the significance to this table.

entity class:
package com.SpringBoot.blog.entity;

import jakarta.persistence.Column;
import jakarta.persistence.Entity;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.GenerationType;
import jakarta.persistence.Id;
import jakarta.persistence.Table;
import jakarta.persistence.UniqueConstraint;

@Entity
@Table(name = "posts", uniqueConstraints = {@UniqueConstraint(columnNames = {"titles"})})
public class Posts {
        @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    private Long id;
    @Column(name = "titles", nullable = false)
    private String title;
    @Column(name = "description", nullable = false)
    private String description;
    @Column(name = "content", nullable = false)
    private String content;

    public Posts() {
        super();
    }

    public Posts(long id, String title, String description, String content) {
        super();
        this.id = id;
        this.title = title;
        this.description = description;
        this.content = content;
    }

    public long getId() {
        return id;
    }
    public void setId(long id) {
        this.id = id;
    }
    public String getTitle() {
        return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }
    public String getDescription() {
        return description;
    }
    public void setDescription(String description) {
        this.description = description;
    }
    public String getContent() {
        return content;
    }
    public void setContent(String content) {
        this.content = content;
    }
 
}

application.properties:

spring.datasource.url=jdbc:mysql://${MYSQL_HOST:localhost}:3306/blog
spring.datasource.userName=root
spring.datasource.password=123456789
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

spring.jpa.hibernate.ddl-auto=update

mysql workbench:

mysql workbench screenshot

thanks for the help!!

tried changing the entity annotations and application.properties somewhat, but not working