Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> caa5193911c75e2af066b444d7c5f97ff358ff95e7c4346401358dd8c098179d:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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