CODE_ERROR

There is an error in the cadence code of this transaction.

[Error Code: 1101] error caused by: 1 error occurred: * transaction execute failed: [Error Code: 1101] cadence runtime error: Execution failed: --> 360c12b5e3fcbdfb0205bf7daa5ec0352d9ee1c17cee0f09a65264dfb70936f8:12:46 | 12 | self.transferToken <- collectionRef.withdraw(withdrawID: tokenID) | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: unexpectedly found nil while forcing an Optional value --> 4cf4c4ee474ac04b.MLS:86:25 | 86 | let token <- self.ownedNFTs.remove(key: withdrawID)! | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^