The increased link_id should not cause any errors.

Yes. This usual happened if you delete previous links from the database. The value of the link_id field will increase with every new link.

If then, is there no way to solve my problem?

Did you find anything wrong in the attached img?

No, after it is only the database scheme but not the actual data.

I had only three links when I submitted the img, in which the "row statistics" => "next autoindex" is "21."

Does this mean that if I add a new link, the id number of this new link will be "21"?

Yes. This usual happened if you delete previous links from the database. The value of the link_id field will increase with every new link.

I was interested in the data to figure out what went wrong.

Did you find anything wrong in the attached img?

I had only three links when I submitted the img, in which the "row statistics" => "next autoindex" is "21."

Does this mean that if I add a new link, the id number of this new link will be "21"?

I guess, the id number of the new link should be "4". If so, my guess is that I have to correct "next autoindex". Am I wrong?

I was interested in the data to figure out what went wrong.

Can you post a screenshot of your esselbach_ct_links table in phpMyAdmin?

Thanks for your kind effort to solve my silly problem.

In the control panel, "add new link" works very well. In the frontend, "links categories" also works well. But, when I click a link under a category, the white page comes out.

In the database in my server, I manually revised the contents in the tables: esselbach_ct_linkscats and esselbach_ct_links.

Now "links categories" in my frontend works great to the deepest. .... But this would not be the way to do the job done.

I am attaching the screen shot.

I am still not able to reproduce this problem

Can you post a screenshot of your esselbach_ct_links table in phpMyAdmin?

Link to white page

Where happens this?

When I click "link 12", only white page appears. The address is  http://mydomain.com/links_jump/12.html for example. Two or three days ago, it led me to the page for "link 01".

I was not able to reproduce this problem so far. Where happens this?