Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 11f437f2a6699d360665b8d3c464b3571f2b01c88e3125191ee5d546c4abe00e:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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