Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> acd032fd814bf4abfc50dc12c91f2aa4d958a115f5027b25760757b0bd4c3eb0:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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