Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 8f3a6263abaa8ba206c89cfc055a7d42afa00eb9a5a619710c2adc41af206541:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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