Problem with alias

Problem with alias

hey
I have a product category called snakewoodtipper, including the right alias
The URL to see the category is:
https://www.tippermaker.de/index.php/de/shop/snakewoodtipper

When I choose one item from the category and click details, I get this link:

https://www.tippermaker.de/index.php/de/shop/snakewoodtipper/snakewoodtipper/snakewoodtipper-sw-1

I think it should be:
https://www.tippermaker.de/index.php/de/shop/snakewoodtipper/snakewoodtipper-sw-1
and this one actually does work.
Why is there a double entry in the first link?
Thanks
Rolf

Aw: Problem with alias

Created item menu as category?

https://www.joomshopping.com/forum/posts/7/1570.html?lang=en#1

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Aw: Problem with alias

Hey
Now, I haven't changed anything and now the problem has disappeared? Cache problem possibly?

Yes, I had created menu items as a category, but not now, years ago: