php - Database column won't update Laravel Eloquent

one text

Solution:

You should add your fields in model fillable property.

    class Currency extends Model
    {
        use HasFactory;
    
        /**
         * @var string
         */
        protected $table = 'currencies';
    
        /**
         * @var string[]
         */
        protected $fillable = ['iso', 'conversion_rate'];
     }