Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> d03e6cadb4d3bf2aa14b59374ef234af9182b745c61125f722ea0b363b6bf80e:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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