how to apply delete in the many to many relation in sequalize

Question

These are the three models.

export const UserPost = sequelize.define(
  "user_post",
  {
    id: {
        type: DataTypes.INTEGER,
        field: "id",
        autoIncrement: true,
        primaryKey: true,
      },
    userId: {
      type: DataTypes.INTEGER,
      field: "user_id",
    },
    postId: {
        field: "post_id",
        type: DataTypes.INTEGER,
      },
  },
  {
    freezeTableName: true,
    timestamps: true,
    createdAt: "created_on",
    updatedAt: "updated_on",
  }
);

User.belongsToMany(Post, {
  through: UserPost,
  foreignKey: "userId",
});

Post.belongsToMany(user, {
  through: UserPost,
  foreignKey: "postId",
});
export default UserPost;

User

export const User = sequelize.define(
  "user_post",
  {
    userId: {
        type: DataTypes.INTEGER,
        field: "user_id",
        autoIncrement: true,
        primaryKey: true,
      },
  },
  {
    freezeTableName: true,
    timestamps: true,
    createdAt: "created_on",
    updatedAt: "updated_on",
  }
);


export default User;

Post

export const Post = sequelize.define(
  "user_post",
  {
    postId: {
        type: DataTypes.INTEGER,
        field: "post_id",
        autoIncrement: true,
        primaryKey: true,
      },

  },
  {
    freezeTableName: true,
    timestamps: true,
    createdAt: "created_on",
    updatedAt: "updated_on",
  }
);

export default Post;

I have two record in the table User with the Id 1 ,3 I have one record in the table Post with the Id 2

I have two record in the table userPost but when I try to delete the record from the table User with the Id 1 and it delete the both two record from the userPost table.

usePost 1 2 3 2

the delete query that I used to delete the records from the table.

 const res = await User.destroy({
    where: { userId },
    cascade: true,
    truncate: false,
  });