Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> aed0531b34772f97afb07bae5ddad66e11efa7f77aea41af6c1e09c52bbfe8b1:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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