How can I fix missing size variant error during bulk import?

I want to add a list of products by bulk importing with CSV, but it gave me a missing value error for my CSV file.

for instance, my handle is new-tshirt-edition and I have 20 pictures for that handle. but my size variant only has 7 sizes, but I have 20 image srcs, so when I left the other 13 rows blank. it throws me an error saying the size variant missing. how can I solve this issue?

Handle Published Option1 Name Option1 Value Image Src Image Position
new-tshirt-edition TRUE Size XS https://abccoserpicture.s3.amazonaws.com/x/M20200364S-1.jpg 1
new-tshirt-edition S https://abccoserpicture.s3.amazonaws.com/x/M20200364S-10.jpg 2
new-tshirt-edition M https://abccoserpicture.s3.amazonaws.com/x/M20200364S-11.jpg 3
new-tshirt-edition L https://abccoserpicture.s3.amazonaws.com/x/M20200364S-12.jpg 4
new-tshirt-edition XL https://abccoserpicture.s3.amazonaws.com/x/M20200364S-13.jpg 5
new-tshirt-edition XXL https://abccoserpicture.s3.amazonaws.com/x/M20200364S-14.jpg 6
new-tshirt-edition XXXL https://abccoserpicture.s3.amazonaws.com/x/M20200364S-15.jpg 7
new-tshirt-edition https://abccoserpicture.s3.amazonaws.com/x/M20200364S-16.jpg 8
new-tshirt-edition https://abccoserpicture.s3.amazonaws.com/x/M20200364S-17.jpg 9
new-tshirt-edition https://abccoserpicture.s3.amazonaws.com/x/M20200364S-18.jpg 10
new-tshirt-edition https://abccoserpicture.s3.amazonaws.com/x/M20200364S-19.jpg 11
new-tshirt-edition https://abccoserpicture.s3.amazonaws.com/x/M20200364S-2.jpg 12
new-tshirt-edition https://abccoserpicture.s3.amazonaws.com/x/M20200364S-3.jpg 13
new-tshirt-edition https://abccoserpicture.s3.amazonaws.com/x/M20200364S-4.jpg 14
new-tshirt-edition https://abccoserpicture.s3.amazonaws.com/x/M20200364S-5.jpg 15
new-tshirt-edition https://abccoserpicture.s3.amazonaws.com/x/M20200364S-6.jpg 16
new-tshirt-edition https://abccoserpicture.s3.amazonaws.com/x/M20200364S-7.jpg 17
new-tshirt-edition https://abccoserpicture.s3.amazonaws.com/x/M20200364S-8.jpg 18
new-tshirt-edition https://abccoserpicture.s3.amazonaws.com/x/M20200364S-9.jpg 19
new-tshirt-edition https://abccoserpicture.s3.amazonaws.com/x/M20200364S-size.png 20

Thanks for your reply, I’m not entirely sure what you mean by duplicating the rows, and for the missing size variant? Do you mean I should put onesize for all 13 blank rows? But I thin Shopify only accept unique size variant