Help me in solving GSQ68B problem

My issue

Solution for this question

My code

/* Write a query to join the table 'Customer' and 'Purchase' using Customer_id as the common column in the table /
SELECT 
    Customer.Customer_id, 
    Customer.Customer_Name, 
    Customer.Customer_Age, 
    Purchase.Purchase_id, 
    Purchase.Customer_id AS Purchase_Customer_id, 
    Purchase.Purchase_amt, 
    Purchase.Last_purchase_month
FROM 
    Customer
LEFT JOIN 
    Purchase
ON 
    Customer.Customer_id = Purchase.Customer_id;
show error 

Learning course: Database management systems
Problem Link: Project - Left Join Two Tables in Database management systems