500 Internal Server Error

Undefined array key -1

#0 /.../lib/models/Model_Product.php(1290): Slim\Slim::handleErrors()
#1 [internal function]: Model_Product->getActualBiddedPrice()
#2 /.../lib/vendor/redbeanphp/rb.php(3015): call_user_func_array()
#3 /.../lib/views/web/auction-current-bid-info.php(16): RedBeanPHP\OODBBean->__call()
#4 /.../lib/views/web/inc/auction-list-product.php(118): include('...')
#5 /.../lib/views/web/auction.php(748): include('...')
#6 /.../vendor/slim/slim/Slim/View.php(278): require('...')
#7 /.../vendor/slim/slim/Slim/View.php(255): Slim\View->render()
#8 /.../vendor/slim/slim/Slim/View.php(243): Slim\View->fetch()
#9 /.../vendor/slim/slim/Slim/Slim.php(755): Slim\View->display()
#10 /.../lib/classes/BDSlim.php(22): Slim\Slim->render()
#11 /.../lib/boot/07_routing.php(184): BDSlim->render()
#12 [internal function]: {closure}()
#13 /.../vendor/slim/slim/Slim/Slim.php(596): call_user_func()
#14 /.../vendor/slim/slim/Slim/Slim.php(1365): Slim\Slim->notFound()
#15 /.../vendor/slim/slim/Slim/Middleware/Flash.php(85): Slim\Slim->call()
#16 /.../vendor/slim/slim/Slim/Middleware/MethodOverride.php(92): Slim\Middleware\Flash->call()
#17 /.../vendor/slim/slim/Slim/Slim.php(1300): Slim\Middleware\MethodOverride->call()
#18 /.../lib/boot/07_routing.php(196): Slim\Slim->run()
#19 /.../index.php(34): require('...')
#20 {main}