Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 371fa4d76b4d8186f3cd755efea278ffeb4831bb82bc62bbf785a4d0110d4241:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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