Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 467352813f5b6b2cc834f94ec566b35af2cc6c32dd1958dec5891d9d4db18c85:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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