lluminate\Database\Grammar::parameterize(): Argument #1 ($values) must be of type array, string

I have a problem trying to send values in the form of an array from the input, what is the solution? I searched a lot, but I did not find a solution to this problem. Can someone help me? Thank you

//blade

<td>
    <input type="text" class="qty form-control" name="p_unit[]">
    @error('p_unit.*')
    <div class="alert alert-danger" role="alert">
        
    </div>
    @enderror
</td>
<td>
    <input type="text" class="qty form-control" name="p_lastPrice[]">
    @error('p_lastPrice.*')
    <div class="alert alert-danger" role="alert">
        
    </div>
    @enderror
</td>
<td>
    <input type="text" class="qty form-control" name="p_averagecost[]">
    @error('p_averagecost.*')
    <div class="alert alert-danger" role="alert">
        
    </div>
    @enderror
</td>
<td><input type="text" class="form-control" name="p_priceA[]"></td>
<td>
    <input type="text" class="form-control weight" name="p_priceB[]">
    @error('p_priceB.*')
    <div class="alert alert-danger" role="alert">
        
    </div>
    @enderror
</td>
<td>
    <input type="text" class="form-control unit_cost" name="p_priceC[]">
    @error('p_priceC.*')
    <div class="alert alert-danger" role="alert">
        
    </div>
    @enderror
</td>

I have an activated button that repeats the same fields to fill them in again, and after that I want to send the data in an array to the database

// controller

$products = $request->p_code;


for ($i=0; $i<count($products); $i++)
{
    $items = productUnitPrice::create([
        'p_code'               => $request->p_code,
        'p_packing'            => $request->p_packing[$i],
        'p_conversionfactor'   => $request->p_conversionfactor[$i],
        'p_unit'               => $request->p_unit[$i],
        'p_lastPrice'          => $request->p_lastPrice[$i],
        'p_averagecost'        => $request->p_averagecost[$i],
        'p_priceA'             => $request->p_priceA[$i],
        'p_priceB'             => $request->p_priceB[$i],
        'p_priceC'             => $request->p_priceC[$i],

    ]);

via Chebli Mohamed