Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 8258f1d65dbd913e9fd16399cbc42bec0afce173eb6a5c47fd72903c805c0c43:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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