Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 05b0e4b5af575cb0f2ab92ffab735f985270bc5f1b1c394a4d58eafc6323c78c:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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