After trying to delete a subcategory: error message "Category cannot be loaded" ?

[daddyshop]

Hello,

After trying to delete a subcategory i got this error message "Category cannot be loaded" ?

After reading this threads: http://www.prestashop.com/forums/viewthread/75234/general_discussion/solved_category_cannot_be_loaded

I don't see any problem on ps_category_group

Any suggestion or help would be Grateful!

Kind Regards,
Heinz