Hi Harshit
Thank you so much for your reply, the problem here is the serial has to be the same we cannot change it, and the status of it in data base is 1, that means that number is not in the inventory anymore, so we can use it again, isn't it?
So the user made a good receipt with different serial number (he couldn't make the good receipt with that original seral numbers) and by the Serial Number Management, he tries to change but the system drop a error message like "the serial number already exists" again.
if you know something about the reason I'll appreciate all the help you can give me.
Regards,
Julián Lozano