The game was only 12 minutes old when Warren collided with Joel Havermans on the halfway line and received a blow to the face.
Warren was not taken to hospital but had bruising around his mouth and may need a couple of stitches.
Both sides are now preparing for the third round of the FA Vase this Saturday.
FOR MORE REACTION, A FULL REPORT AND A PREVIEW TO THE FA VASE SEE THURSDAY'S NEWS
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