Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> ea2069875181f6b09ab9dcb65fdf11abae0a32b9cdf3a5715388f9a0b1f6ebad:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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