Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> cc14d1dce43356b9f32d76d5f8023cb1484e0046ec4a0fec943f4073722f04e2:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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