Meaning: The opening does not have any range values defined and therefore you cannot select the cutout when using range queries.
Recovery:
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Select the opening (cutout) in error.
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Select a property in the Properties View, and set it to a different value. Then, set it back to the original value.
If the cutout does not recompute and clear from the To Do List after you edit a property, the only other option is to have your database administrator run the Database Integrity Check in Project Management.