Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 61bfe18a9b214ea17dde8444d8cf469bc40d28ce41c4df6a851af5e6529db809:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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