Administrators may want to reset the Starting Experiment ID value for Experiments due to changes in naming policies, but there are no options in the Experiment System Object to reset the value. This is by design and can’t be modified. If global auto numbering for Experiments has been enabled the sequence will continue to increment and can't be reset.
Solution: It is not possible to reset the 'Starting Experiment ID' for Experiments in Signals Notebook. An alternative is to disable global auto numbering for Experiments and to setup a specific custom sequence for the experiment template, but this will not have the same behavior as global numbering. For more information on experiment numbering at the following video: Best Practices for Numbering Experiments and Other Objects Rel. Feb2021