You need to tell your PO about the new case. She cannot arrest you on the spot. She will have to send your file into the court so a violation can be filed and a warrant issued. You need to hire a defense attorney immediately. They can arrange a walk through to post the bond on the pv so you don't actually go into custody.
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You will likely get a warrant on a motion to adjudicate your deferred probation, and you will have to answer to both cases. You will need a lawyer. If you are indigent, they will appoint one to represent you.