Save records in two tables in laravel?

I am trying to make two records in two different tables, these are not related, what I want to do is that when I send the information it updates the stock in the store_inventories table, the tables are the following:

This is my method:

public function saveInventoryEntry(Request $request)
{
    $message = null; 
   
    $data = $request->all();
    $ids= [];

    try {
        foreach ($data as $key => $inventory) {
            
            $inventoryEntry = new StoreInventoryEntry();
            $inventoryEntry->inventory_id = $inventory['id'];
            $inventoryEntry->code = $inventory['code'];
            $inventoryEntry->quantity = $inventory['quantity'];
            $inventoryEntry->save();

            $ids[] = $inventory['id']; 
           
            StoreInventory::whereIn('id',$dt)->update(['stock' => $inventory['quantity']]);
                           
        }
        
        $message = $this->sendResponse($inventoryEntry, 'Aggregated data');

    } catch (\Exception $e) {
        $message = $this->sendError($e->getMessage(), ['Entries could not be registered'], 500);
    }

    return $message;

}

I send the data as follows:

[
 {
    "id" : 1,
    "code" : "010101",       
    "quantity" : 10 
 },
 {
    "id" : 2,
    "code" : "23232",       
    "quantity" : 7 
 }
]

Migrations:

public function up()
{
    Schema::create('store_inventories', function (Blueprint $table) {
        $table->id();
        $table->string('code');
        $table->string('reference');
        $table->string('line');
        $table->integer('cost');
        $table->integer('stock');
        $table->integer('min_stock');
        $table->string('location')->default('Almacén');
        $table->boolean('status')->default(1);
        $table->timestamps();
    });
}

public function up()
{
    Schema::create('store_inventory_entries', function (Blueprint $table) {
        $table->id();
        $table->unsignedBigInteger('inventory_id');
        $table->string('code');
        $table->integer('quantity');
        $table->foreign('inventory_id')->references('id')->on('store_inventories');
        $table->timestamps();
    });
}

I want to update what I send in quantity to what is in stock in the store_inventories table

source https://stackoverflow.com/questions/70020313/save-records-in-two-tables-in-laravel