Transaction

[Error Code: 1101] cadence runtime error Execution failed:
  --> 5067a0e931202a958129b8fab429d1293134f449a1a31dfdaec3a28690ee3d34:80:20
   |
80 |         let item <- self.listing.purchase(
   |                     ^

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