Help me in solving SQW29 problem

help
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My issue

Problem is not having solution

My code

/* Write a query to output the following
- product_id, units_sold and month of sale for all high margin products sold in the year */
SELECT 
    dp.product_type, 
    dp.product_id, 
    ms.units_sold, 
    ms.month
FROM 
    division_product_sales dp
JOIN 
    monthly_sales ms
ON 
    dp.month = ms.month
WHERE 
    dp.product_type = 'High_Margin';

Learning course: Database management systems
Problem Link: Project - JOIN and Filtering in Database management systems