(This is an actual process from Driftless Herbal Exchange Network. It happens to make storage of dried herbs easier.)
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There are some bags of dried nettles in the storage area. Each has a lot number tag on it, which can be traced to see who harvested it, when it was harvested, etc.
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The person in charge of the storage room (West) wants to consolidate these bags. He takes them and carefully dumps them all into a new bigger bag.
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He labels the bigger bag with a new random lot number, and puts the older labels there too so it can get recorded in the computer.