Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> cc0e5e5f230deadc210ddb1c2b8dafb9679577db5ad2c13f41161c785412bb7c:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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