Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 9e2e2e42cbedbae2e644c81de22025cb4123c07af15fb069dc56e6f9f06b32c6:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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