When calculating the hash of transaction, why is the model used as “01000000” as an alternative of “00000001”?

In keeping with the protocol documentation for tx, the primary discipline on the transaction information is a model variety of dimension 4.

Primarily based on this, I’m making an attempt to format the array of bytes wanted to calculate the TX hash for the genesis TX, so I retrieve the block data from my node:

{
  "hash": "000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f",
  "confirmations": 708859,
  "top": 0,
  "model": 1,
  "versionHex": "00000001",
  "merkleroot": "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b",
  "time": 1231006505,
  "mediantime": 1231006505,
  "nonce": 2083236893,
  "bits": "1d00ffff",
  "problem": 1,
  "chainwork": "0000000000000000000000000000000000000000000000000000000100010001",
  "nTx": 1,
  "nextblockhash": "00000000839a8e6886ab5951d76f411475428afc90947ee320161bbf18eb6048",
  "strippedsize": 285,
  "dimension": 285,
  "weight": 1140,
  "tx": [
    {
      "txid": "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b",
      "hash": "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b",
      "version": 1,
      "size": 204,
      "vsize": 204,
      "weight": 816,
      "locktime": 0,
      "vin": [
        {
          "coinbase": "04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73",
          "sequence": 4294967295
        }
      ],
      "vout": [
        {
          "value": 50.00000000,
          "n": 0,
          "scriptPubKey": {
            "asm": "04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f OP_CHECKSIG",
            "desc": "pk(04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f)#vlz6ztea",
            "hex": "4104678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5fac",
            "type": "pubkey"
          }
        }
      ],
      "hex": "01000000010000000000000000000000000000000000000000000000000000000000000000ffffffff4d04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73ffffffff0100f2052a01000000434104678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5fac00000000"
    }
  ]
}

I see the model inside tx has the worth 1, so I perceive the array of bytes ought to begin with 00000001, however on The right way to calculate a hash of a Tx?, the accepted reply exhibits it beginning with 01000000 and I do not perceive why, might somebody assist please?