Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 62a1ca807c2ed275079b8d3509995f483cbc0d27e28bf605c9a6d7f35372ea05:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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