That's a great idea. I would go further and like the option to turn this 'feature' off entirely, if needed.
Linnworks does not do everything required on every sales channel. This inevitably leads to having to make bulk edits via csv onto the specific sales channel eg Amazon, Bigcommerce etc.
If Linnworks has randomly changed the SKU while creating the listing this task becomes difficult. Instead, we have to manually change all the SKU's back to their original SKU before listing using Linnworks. I don't really understand why Linnworks needs to change them in the first place. If the SKU already exists on the sales channel then just give an error message.
In any case, please give the option to turn this off.