Whether or not the new transaction has RBF enabled is irrelevant. That's the not the transaction you are trying to replace.

khaled0111 is correct. All that this method is doing is attempting to double spend your initial transaction. The vast majority of nodes are set up to reject double spend transactions, even those with higher fees than the original, you will likely be hit with a mempool conflict error when you try to broadcast your new transaction. Even if you do find a node which accepts it, then that node will almost certainly be unable to broadcast it to other nodes for the same reason.