Anatomy review

When you execute the following script:

INSERT INTO products (product_name, stock, price)
    VALUES ('Trek Powerfly 5 - 2018', 10, 3499.99);

The console of your SQL Server shows this:

Msg 2627, Level 14, State 1, Line 1
Violation of UNIQUE KEY constraint 'unique_name'. 
Cannot insert duplicate key in object 'dbo.products'. 
The duplicate key value is (Trek Powerfly 5 - 2018).

What are the different parts of the error you get, from left to right?