I checked the Purchase order and the customer license must be valid upto 2046.
The license details were entered in erroe by our team and we apologise for that.
I'm getting the information corrected and that might involve deleting the current license and recreating a new one.
Once I get confirmation from my team on the correction I will let you know, so that you can ask the customer to reassign the licenses as required.
Thanks and Regards,