Remove category from product url results in 404 error

[quiced]

Hi, 

when I try to update product route to this (goal is to have product url without category):

{id}-{rewrite}{-:id_product_attribute}-{-:ean13}

it results with 404 error in frontend when I go to category and click to product link which seems to be without issue. When I try this route:

{/:id}-{rewrite}{-:id_product_attribute}-{-:ean13}

then result is "site//id-rewrite" but product shows without 404 error. It seems really strange behavior for me. Is here someone with same problem and solution? My PS version is 1.7.5.1.

 

Thanks for reply.