Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 705979c6287d5317ed766049a713080cf4f9a153ecc001770e17a421954e64ac:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

error: pre-condition failed: listing has already been purchased
   --> 4eb8a10cb9f87357.NFTStorefront:243:16