I'll tell you why this issue occurs, to make things more clear.
When you use the import wizard, it creates .tmp files with random names beginning with the letters acq.. eg.., acq0a3lsdf.*. the temp files are then renamed to the original extension -- e..g, .jpg, .mp4, etc.
acq0a3lsdf.jpg
acq0affsdf.jpg
acq990sfd.jpg
The bolded part is the random string generated by the tool. The import wizard has a bug that causes it to create the same set of
randomstrings after processing a number of files, thereby attempting to create duplicates. Since the file names already exist, it's not able to overwrite them.
Ohh okay that makes sense thats a better explanation but I had the temporary folder at the same time as windows import was importing pictures and I saw that it was making temporary files one at a time but randomly it stops working. I don't know if it remembers past random strings which gives that error. I even used the standard photos app to see if the photos are being detected and even then it gives me an error saying that nothing is connected to my PC which is odd because i just took out the phone an replugged it back in AFTER resetting the photos app via add or remove features