Oil change on my ford focus! Big proublem?

So i was changing the oil on my 2007 for focus today. Took oil out everything good. Took off old filter everything good. BUT! When i was putting the bolt back on the motor to add the new oil, i over tightened the bolt so it just kept spining! Turns out some of the tread from inside the motor came out in the bolt when i took it out. Now it does not tighten good. It does a little but not all the way. What can i do now? Please help! D:

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