3ds - error to copy nand files to my pc

hey guys, i am jailbreaking my old 3ds and i got this problem to backup my nand file to my pc. everything in the process of jailbreak went correctly but some reason, my win11 shows that i can't copy to my pc cause file is corrupted. someone know about something?

https://preview.redd.it/2ehkiz3b8cmg1.png?width=449&format=png&auto=webp&s=1a7d72d76387da97028cea498be5c37534659d08

can i make another nand dump with godmod9 without deleting the file that already exists?