Unable to mark words as known

When I try to mark new words as known words, the warning saying that I reached the max 20 LinQ appears even if I don’t want to mark words as LinQ. I also deleted some of the LinQ words, but the problem is still appearing.

@Luis_Elvira - The limit for Free accounts is actually a hard limit, so once you’ve created 20 LingQs you won’t be able to look up any more words even if you delete your LingQs.

With a Free account you can still access the content on the site and participate on the forum and the Exchange. In order to create more LingQs you will need to upgrade your account from the Account page.