reorg a bitcoin transaction
A blockchain is a chain.

Each block is a link in this chain, that depends on the previous link (block) by definition.

If to change block N, all blocks from N until now must be mined again as well.

Moreover, if you want to alter a specific transaction, you are limited to only removing it if you do not hold the key(s) used to sign the transaction. If you wish to perform an alteration that changes where the BTC is sent, you must not only mine the entire section of the chain again, but also hold the private key(s) involved in that transaction to produce an alternative, valid tx.