Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 2db226e3920adf75f6c4e4d7d80311f7b4bde20a629a89da20774cf84a3822d5:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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