I'm actually trying to receipt products on which traceability on lot have been activated. So I've been able to make several products reception with product lot. But now I've another product reception for which I have the same supplier product lot(which can happen quiet several time) but the system refuses to validate the reception giving the following error :
"The combination of serial number and product must be unique !"
While I'm expecting that the system see that there is already a product lot defined for this product and simply reuse it.
So does anyone is facing or has faced the same issue or I'm totally wrong in the way to manage this case?

I have an workaround for it it:

if I make an "Update Qty On Hand" on the product, I can use an existing lot. But so I can´t use the normal way over purchase orders.

Thanks for help