Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 19588bcf8d6e67da87d3b25741e54a0c7a6c35a1d3a2d8748a24161b209cbb33:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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