Same lot number automatically created for 2 different receipt

Hello, all,

My customer is facing a problem regarding generated lot numbers.

Normally, the system is set up to generate the lot numbers (not the serial number) at receipt. It means that the system assigns a different lot number at each receipt.

We are facing the following issue: the system assigned the SAME lot number for 2 different receipts of the same item (first receipt 2 months ago and second receipt yesterday...)

Did someone have the same issue ?

Thanks and regards