Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 9eda2d604c14a4752cbb0f049ee4187bc73ded6e81712d3e1683237b2bd65593:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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