Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 5e022e0bec85f65240756f621606f1d5704d404d865f50a5fcdd8f85b2ec6df2:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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