404 on canonical url

-- HikaShop version -- : 3.0.1
-- Joomla version -- : 3.7.0
-- PHP version -- : 7
-- Browser(s) name and version -- : Chrome
-- Error-message(debug-mod must be tuned on) -- : 404

Hello,

today I've made a big mistake. I accidently trashed some menu items (hikasop products listing and hikashop category listing). After untrashing them, my canonical urls are not working anymore
Evenrything worked fine before I've trashed the menu items. My product SEF name = produkt however every link to a product with canonical 'produkt' in it, is not working anymore. Same for category SEF.
It seems like something is broken after trashing the menu items.... Weird.....
Can you please help me... I'm lost.
If you want I can mail you some credentials to login in my test system

Hi Nicolas,

I've blanked out the canonical for 1 product and I let the system create the new canonical... however the new one differs from the old one (which worked before)

old canonical : index.php/produkt/absolute-3-kleurenkaart-19-kleuren
new canonical :index.php/kleur/produkt/absolute-3-kleurenkaart-19-kleuren

as you can see the word 'kleur' is added in the generated canonical (this is the name of a category) while my SEF name for products is 'produkt'

Hi Nicolas,

you're right. Since I've chosen another default menu item it was not working anymore. I've changed it back to a hika menu item of the type you described and it works.

Thank you very much for the support!

best regards
Edward