Vault error when checking in

When you check a file into Vault and get the following error message:
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Date range conflicts

One common problem in database applications is checking for conflicts in a date or datetime range. For instance, your application might manage appointments which have a start date and duration. We might talk about minutes or days here, the fundamental problem remains the same. When you enter a new appointment you have to make sure that it doesn't conflict with an existing one.
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