Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 569357bd1046bc9d1fb3fbc60de1790c3e59e856766ee19dac277ed8f3be265d:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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