NodeJS Sequelize：设置关联值的问题

I have a many-to-many relationship between two tables, product and service, connected by a join table with a column of cost, product_service. When I create try to add a service to a product the first call does not return the updated value, even though the database has been updated, I know because I check it, I only get to see the updated value on my application when I make another call.I have a many-to-many relationship between two