I have a problem with my laravel query builder

Question

I'm using laravel as my web project, and I have an issue when I update my database.

I have an error message on my postman after posting data. Here is the message.

SQLSTATE[42S22]: Column not found: 1054 Unknown column 'id' in 'where clause' (SQL: update `data_transaksis` set `jumlah_transaksi` = 10000, `info` = Transaksi 2 Mysql Update, `data_transaksis`.`updated_at` = 2021-05-23 03:59:54 where `id` is null)

This is my function code to update a row on a database.

$dataTransaksi = DataTransaksi::where('transact_id', $request->transact_id)->first();
$dataTransaksi->jumlah_transaksi = $request->jumlah_transaksi;
$dataTransaksi->info = $request->info;
$dataTransaksi->save();

return response($dataTransaksi, 200)->header('Content-type', 'application/json');

I don't know what's going on with my code, i search for 'transact_id' on my query builder, but the error message shows that I search for 'id'. It's odd. Any solution for my problem?

Edit: This is my table structure. https://imgur.com/gallery/s5Ltmek