Clean up your warehouse user session log!
 

Just like Work Creation history purge and Containerization history purge, your warehouse user session log needs to be cleaned up every once and a while for the same reasons. 

AX 2012

In Warehouse Management > Periodic > Cleanup, look for work user session log cleanup. This will ask you to number of days to keep. If you use zero, all log entries will be deleted. This will remove work user session log (WHSWorkUserSessionLog) records that are older than the number of days specified. Because this uses keep x days, you can set this up to run daily or weekly to keep this table pruned. 

Dynamics 365 for Finance and Supply Chain

This functions the same and can be found in the same place