While posting the Outbound shipment (not the bundle scenario) it is not allowing

Issue No: LG-1931
Created 2/4/2019 5:27:04 AM
Type Bug
Priority Blocker
Status Closed
Resolution Fixed
Fixed Version 18.3
Description This issue is happening in the follwing link SCO customer .   [http://irelyserver1.com/irelyi21sco/]   Create a contract for purchase and sales   Select any item ( not the basket)   Create the IR.   Come to the load shipment for outbound and select the same sales conttract and select the Lot number also   click on post . it is showing below error message.   !pastedImage_d111756_0.png!