Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> ca623e332308f7ea01b46d0345f5cc6d483d036a2e8b68e44cbc1e03de11bbac:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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