Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 63df9bab4def3e0e1da71fb4fe577ebbb16c5ee3062d5ad37778b6dd241d604e:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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