Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 032d70bb1d59479a34a09e1d2cb60c4940ac578f271985b1f304f2407cfda0f1:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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