Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 5df4b9195f7e6bf4952d74a04cca09f408b1a24533ee565f07cacf8d4ea8703e:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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