If you want to clear all of the award triggers for all of the individual Cubbies Stickers for all sections in all of the Cubbies books, you can run the following SQL:
update Gen_Section set Award_1=null, Award_2=null,
Award_1_Item_Number=null, Award_2_Item_Number=null
where Book_ID in (300,301,302,303,304)
Note: Running this SQL statement will NOT affect the award triggers for the Cubbies patches since the patches are part of the Section GROUP award records you see on the last page of the generic handbook screen.