Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 4ce14227cb377cb1c266da865b54def50fce8ed8d8cdff43d6ba9c5fb8624042:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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