Charles and Irene are editors at a content development firm. Both of them, unknowingly, are working on the same copy of the annual report. Irene finishes editing the report and saves her copy; Charles saves his report an hour after Irene. Charles's report overwrites Irene's, and her changes are lost. This scenario is an example of the $\_\_\_\_\_\_\_\_.$

update query problem

bait$-$and$-$switch problem

bullwhip effect

crow's$-$foot paradigm

lost$-$update problem