Time spent is an accumulation of the work logs on an issue. To "reset" it, you need to remove the logs of work done on the issue. This is not something you can do with a bulk-edit type operation, you'll need one of the scripting or automation apps to do it in bulk.
Hello, Atlassian Community! I thought it would be fun to do something different for my teams' last retrospective of 2019 so I'm planning to do a "year in review" with info-graphics. Wha...
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