Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> a231f01725d3ef574f8998d9a44df9f18dccdd22eb3414c878a45f7d64c3fa51:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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