Demo files for import are oudated, i think it's 1.5.X files
A file that works
I tested catergory , products , manufacturer don't work , customer ecrase datas
Hello @okom3pom ,
I tried importing Categories, Products, Manufacturers and Customers on a PS 1.7.7.0 fresh install .
Product Import
One column was missing : MPN
Manufacturers
Brand "Shure" was added twice :

Categories
I had no issue with that import, can you specify what went wrong ?
Customers
It did erase the customers that I had before and replaced them with the one from the CSV file even thought I chose the option Force all ID number and Delete all customers before import to NO :

You can choose the option : Ignore this column for ID, and your previous customers won't be erased.
Thanks.
Hi @florine2623, @okom3pom,
ecrase datas
I this it is similar to this issue: https://github.com/PrestaShop/PrestaShop/issues/21565
Thanks!
Hello @okom3pom ,
Could you confirm @khouloudbelguith 's comment ?
If your issue is a duplicate I will close this issue, and we will focus on #21565.
If it's not a duplicate, please specify what issue you are having !
Thanks!
Hi @florine2623
Sorry for ansewer time, i am very busy.
I will do new tests today
It's not the same issue i test again and i have error.
To test : download the demo file don't change it and try to import.
When i have the time i open a PR with good file.
@PululuK have starting the job in 178 i ask him
https://github.com/PrestaShop/PrestaShop/commit/f0d1afd166c4fb041a1ad6e13cf1b8b32f1f4b06
Hello @okom3pom
=> OK
https://drive.google.com/file/d/1WOk2i4p1Yd6_ZnU8Jl4CdNEYVElC-5mE/view
=> NOK, I didn't check the Delete all customers before import option and yet after the import I couldn't find my old customers :confused:
https://drive.google.com/file/d/1xc5gouhxhzcPJwIDRT6XFgz2DVNR817j/view
=> NOK, I didn't check the Delete all brands before import option and yet after the import I couldn't find my old brands and I notice that the brand Shure is duplicate :confounded:
If I check the Delete all brands before import option => OK
https://drive.google.com/file/d/1CTTFVeUks4IbUaIcwcRvvGqIRw5bB3go/view
So, I confirm that there's an issue with Customers import => To Do (and it's related to this #21937)
But, we need to check the Brands import => NMI
Please check and feedback.
Thanks!