Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 02c82e088f233a07aac8cddc9bd635ff2a92b4db4c59ba6f33d1916b1f60371e:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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