Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> ee5b0093e9f99c10a7c7af7653e22ac366eb2bfba7445eaed28477822759f891:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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