Yes! We are strong believers in second chances. If your design didn't win in a previous Minted Challenge, you can certainly submit it to a new challenge. Please be sure to update the design appropriately for each given challenge format.
While you’re welcome to submit the same or a very similar design to a new challenge, please do not resubmit slight variations on designs within the same challenge. If you need help deciding between two versions of your design, try a design poll.