Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> de0f37b7135aa845fbaeb52bb1c522a4ff4c88ab052a67cf763f74d25e356ee5:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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