Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 45c7d84b10c6ad2265c02d8bc74fe8583ccb6470fa69b0164366707f0e82a1cf:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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