Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 00bec3e2c441435b604b6deed19b2bcc3072012e5713c648eaf8701b9eeec4b6:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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