Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 29199df556d24c89186168eebc327367e82aa677ffe69483d3b61a14a75cb926:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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