Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> a42147155cba3172c3484c1db6e42d0fec19a43a3ee3330b98154ec53d397290:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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