Removing a draft version of a model
If you no longer need a draft version of a model, you can remove it. If there is a previously published version of the model, removing the draft reverts the model to the last published version.
Procedure
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In the model page, click Remove Draft.

A confirmation dialog appears.
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To confirm your request, click OK.
Unsaved changes to the model are discarded; if the model was saved as a draft, the draft is discarded. Then the Models page loads.