Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> abb00283960cf12f0224679e3398a4dbdb5479c32cd40e61e3326e3ded9a3f64:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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