Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> de3e91c55fdb082e3f7315addfb1727905c9a2cc6117276df45b221735014e0b:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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