Solved Succecfully installed but NO kunena at components

I want to export only Kunena tables - Should I export all of them in one SQL file?

Mark only all Kunena tables, then scroll down and, at the dropdown list choose Export.

Thank you!
I exported kunena sql database
Then Uninstalled Kunena from Kunena component Tools
Now I was trying to to import Kunena database but it shows error.
Here is the screen of the error page:

it seems that when you exported the Kunena tables you also got something from joomla So do that again "database tables from your backup "and check only the kunena tables and then export 

I thought the same way and exported Kunena tables again. But the error still exists.
Maybe I should delete something?

very strange if you only exported the xxxx_kunena records and then deleted them from the database.
Then if you use tab import and use the correct kunena.sql file you should really succeed.
ps
if i see it right, it looks like you hks7d_action_logs selected and exported
those does not belong to kunena table so that must be it. s
o either you try again or you are looking to this hks7d_action_logs and delete only those
and try then import it again.
But always make sure you make a good backup of the Website first

Rich, please can you see the problem? I did import several times but the answers were always the same. 
Please!!!

You cannot import tables if they already exist. It seems that you have not done these steps correctly.
www.kunena.org/forum/installation-issues...ents?start=20#224294
It's hard to help if you have no experience with databases. With a single mistake, you can destroy your website beyond repair. Then you have to reinstall the old Joomla 3.10 site and start all over again.
Don't you have anyone who can help you carry out these steps?

Thank you Rich.
Unfortunetaly I don't have anyone who can help me.
I am children's book writer, and not familiar with web developing very much and try to do everything myself for several years.
This website is not financial one and it is not business.
So I cannot pay a lot to professionals to make it work.
Maybe I can do it myself? If you could help with instruction?

hello i have put a video's on  my test website  Film and Film2

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about exporting in import with phpmyadmin.
it's not the best movie but  and unfortunately this explanation test films is dutch but I hope it can put you on the right track
so export the kunena items from the database of your old website backup.
then remove the kunena items from your current database and import that of your old database.
but watch out for that sulfix of your old and new database must be the same
@Leen The address to your video is not available for users if you use confitential tags.
@rich  thank you modified hidden from guests now

@Leen The address to your video is not available for users if you use confitential tags.

@uzbaby
Go to your created database with the old tables. Select only these Kunena tables (see picture). Then scroll down and select Export in the dropdown menu and click OK. After the export you will find this file in your download folder. 
You must then import this file into your Joomla 4 database.
Then try to install Kunena 6.0.3.
But make a backup first. It's easy with Akeeba Backup if you don't have anything else.
.