An arrest without a conviction will probably not be deemed admissible by a judge. The process to stop the records from being produced by the sheriff's department is to file a motion to quash the subpoena. Your attorney should know how to do this. If you do not have an attorney, you are at a severe disadvantage, as you are going to have to learn very quickly. But even if the records are obtained by the defense, that does not mean they will be admitted into evidence in trial. Good luck.
They say you get what you pay for, and this response is free, so take it for what it is worth. This is my opinion based on very limited information. My opinion should not be taken as legal advice. For true advice, we would require a confidential consultation where I would ask you questions and get your complete story. This is a public forum, so remember, nothing here is confidential. Nor am I your attorney. I do not know who you are and you have not hired me to provide any legal service. To do so would require us to meet and sign written retainer agreement. My responses are intended for general information only.
You may be able to file a motion to quash the subpoena. Even if they obtain the arrest records, it's unlikely there would be any basis to admit them at trial.
As the other attorneys have noted, you are making a serious mistake if you are attempting to litigate this case on your own. Don't waste any more time retaining counsel.
This answer is a general interpretation of the law and is not fact specific to your case. Likewise it does not create an attorney-client relationship. You should seek an attorney for a review of your specific facts and documents.