Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 95fca4046c8ce1a03a75a5c9758c34d15db3b744a97b471c8f57c4a5067474fb:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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