Importing products through a csv file

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im having difficulties when importing muy csv file, according to me everything is fine, all my pictures are uploaded and the links are on the file correctly,all the information is on the correct columns and rows  I don't know why it doesn't import them all, I have 422 products and it only uploads like 294 ,303 and it changes everytime I try to upload sometimes it loads more products and sometimes less, even when I didn't changed anything on the file.

could someone please help me?

Thank you!