Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e22589802b3135b0270148576fe8d1c05dd5d581fa389aae15083bfba05e70a7:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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