I recently started to get Duplicate Errors after I added some new product features. After the 1st error I went back and deleted what I had changed and this seemed to fix it, I had uploaded 12 or so new items but now I getting the error again.
I have attached a screen shot of the latest error. In the txt does it point to a particularly problem? As im not sure where to start looking to find the error.
The error you receive indicates, that Store Manager can not Post Changes to Web because some data may be duplicated.
Probably you have been doing some changes from PrestaShop back-end while making changes in Store Manager.
You can find more details on how to rectify it in the article below: