Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 10f7ef5b850e4ad25e6db49adf45a0f25357d4bff67c8423c0f7779d0edb7d17:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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