Error message

Notice: Undefined index: in_stock in views_handler_filter->store_exposed_input() (line 1395 of /home/sanmarcofurnitur/public_html/sites/all/modules/contrib/views/handlers/views_handler_filter.inc).
Favorit set
In stock
$4,800.00
Status set
In stock
$4,500.00
Premier set
In stock
$4,450.00
Cardinal set
In stock
$0.00
Chester set
In stock
$4,700.00
Schengen set
In stock
$3,200.00
Lux set
In stock
$2,250.00