Quoting below from Ardel regarding managing the station warning lists that are often pending although shipments are duly verified:
 
“The purpose of WL is to alert the operator to check the AWB data before the verification. Now, if the operator is 100% sure that the data in the AWB is 100% correct and record can be verified then operator can delete the item straight away from the list. Once verified, record can be used for billing.”
 
So please, just make sure that once you have verified the departed shipments, and you are sure of the data quality, just proceed to clear the list.