Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 34c5fce35acc0aab27edf7c1a9859a5e8d64b48528bf6916571a139e2a49b45d:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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