Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> f07373d7bf2b4abfaab4777ed5e9a6152775f53d5ec621478cc90e1bdc83f8f9:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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