Transaction

[Error Code: 1101] error caused by: 1 error occurred:
	* transaction invocation failed when executing transaction: [Error Code: 1101] cadence runtime error: Execution failed:
  --> f77b947170033f8b01ba33a4e74ff7ba99d0cd62ca6570c480b71b6482202e81:20:23
   |
20 |             let nft <- collectionRef.withdraw(withdrawID: nftIds[x])
   |                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: panic: missing NFT
   --> cc838e3f0213008f.Epix:103:67
    |
103 |             let token <- self.ownedNFTs.remove(key: withdrawID) ?? panic("missing NFT")
    |                                                                    ^^^^^^^^^^^^^^^^^^^^