Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 464862d0550479c2eaae9c9dc712dc676e30fc5b3c8b893627eb65f4dad15bbf:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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