Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> a9d637b7093bdbbea82f84e07b6e1647b4e6ef8847ef5d145f406b2fc432172d:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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