On a practical level, I would usually just contact opposing counsel and ask them if they have an issue with it, and confirm the conversation in a writing. If you are not in a friendly or at least professional basis with the opposition, then you are best served by starting over. The worst case scenario is that everything is delayed even more by objections interposed later. At best you have only lost 10 days right now.
Good luck to you.
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It would be best if you prepare a revised Subpoena form and serve it on the deponent again. If they will waive personal service, perhaps you can send them the revised Subpoena by fax or e-mail. Be sure to consult your own attorney to protect your legal rights.