Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> acbefc37561e056f7a3610e37d24fadb0337ce231ebfe65eff47cf59e9d6db80:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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