Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> c17d13bfb05a3b8d32601c5409d3e8622f9ba38ecef38d60f5cc56c4a3a53aea:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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