Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> f80c237a96153a86ee434ee32312d258fb99bbaada0c19f5644b1a158012929e:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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