Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 1c6cc10708b0f2af2db071c481b91c9ddecfa0fd23221721c6d19f40d677fd59:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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