[Hacking attempt] an item is not valid in input parameter "selection"

#1    check_input_parameter /home/deb55565/domains/harteveldmaasdijk.nl/public_html/albums/admin/batch_manager.php(44)
#2    include /home/deb55565/domains/harteveldmaasdijk.nl/public_html/albums/admin.php(291)

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