Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 88e1bad23bbd514074bc451e4b4dcba23947a0f6e5ca7612c62050ec19d56d8d:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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