Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 341fd98ddbf5def0fa931f31719e2fd5ba51253c2c5233362ec54c2cc38876f1:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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