Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> ba7283f8d97a2e38303cc301ceef983729d7a03238709bfe9d8f425d3263638c:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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