Item coverage wizard

Hi, 

If I go to Item details (choose any item) -> Setup -> Item Coverage and then run the Wizard I see the text " The wizard has identified X invalid item coverage settings." X = 0 or higher.

for some of my items I in fact have 1 invalid item coverage setting, I like to know what check is made by the item coverage wizzard so that I can run it my self in sql and check all items at once.

so, can anyone provice my with an sql statement that I can run to check for invalid item coverage settings?

regards