Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 3698650b947d91d743a8a4e2593eace7d29f6d3dbe08d7829df5cec27b31a2d4:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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