Import from CSV

Import from CSV

I am working on creating an inventory of peripheral equipment. So I created a Keyboard and Monitors area under IT Assets. I go to import using a CSV file and it will only display the final item in the file and seems to overwrite the others even tho they all have different serial numbers. I want to be able to do this with monitors and other items and want to figure this out so that I am able to import them all successfully.
I have attached my csv file.

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