Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 53bb898ad734f1ad39e159a0ffb919fd16b40c121a105572b6c23d2c7fc69420:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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