Stuck?!?!

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I have an iPod touch that I want to update to iOS 9, but cannot do it OTA because it is jailbroken. I can't update with iTunes because I get a message reading: "iTunes cannot read the contents of the iPod. Go to the summary tab in iPod preferences and click Restore to restore this iPod to factory settings." Is there any way to get out of this, or am I just screwed?