Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e5fb6db3a8903b51bd1d8aed3414d31aa9662777bb6d3fe6062232a4a101d2ea:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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