Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> e3ab31358e12f964497e4c73039ab4a8a34c6e1e150369a590ab3bf779eb2297:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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