Update lot# to enter a new expiration date

Hello,

We are on 12.2.3 and use Inventory module.We do not use WMS.

We have items that are enabled for lot control and lot expiration date.We have some items that have the same lot# say L1 in multiple locators .Since lot expiration is by lot# , we are now unable to give items in different locators with the same lot# different expiration dates.So we want to modify the lot#s in these locators.So lot# in locator A1 and B1 must have different lot expiration date.In order to do sowe will have to modify the lot# in these locators so A1 will have lot# L1 but B1 will have lot# L2.How can we modify the