Question Upgrade to Beta 7 missing all categories

On Chrome, I am able to zoom in on the screenshots.
Regardless, I still can't get the categories to appear after upgrading.

1) Maintenance: Global Check-in. There are no tables with checked out items.
2) Since the categories do not appear in the kunena component, I only was able to unpublished and republish the cats in phpmyamdin, but that did nothing.

I am still where I was when I first posted this issue.

Maybe this original issue is the key to get Kunena 6 to work?

If I try and create a new category I get this error: ​​​​​​​

Any ideas on how to resolve this: 1054 Unknown column 'parentid' in 'where clause' ?

Database collation check: The collation of your table fields are correct

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Kunena menu details:

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1900	Help	kunenamenu	view=misc	forum/help	No
1901	Search	kunenamenu	view=search	forum/search	No
1902	Forum	mainmenu	Itemid=1892	kunena-2022-02-15	No

Joomla default template details : shaper_helixultimate | author: JoomShaper.com | version: 2.0.7 | creationdate: Feb 2018

Kunena default template details : Aurelia | author: Kunena Team | version: 6.0.0-RC1-DEV | creationdate: 2022-02-20

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Kunena version detailed: Kunena 6.0.0-BETA7-GIT | 2022-01-18 [ Git Repository ]
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| Kunena integration settings:

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Kunena - Finder Disabled
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Kunena - Community Builder Disabled
Kunena - Easyblog Disabled
Kunena - Easyprofile Disabled
Kunena - Easysocial Disabled
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Kunena - Joomla Enabled: access=1 login=1
Kunena - Kunena Enabled: avatar=1 profile=1

| Joomla! detailed language files installed:

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Joomla! languages installed:
en-GB	English (United Kingdom)

Third-party components: None

Third-party SEF components: None

Plugins: None

Modules: None

  I found a test version on my PC where I also got an update error.
and only the latest test version
pkg_kunena_v6.0.0-RC1-DEV_2022-03-02.zip 
i install without error
the nightly version was already gone so I added it as an attachment
 

I tried installing the version you posted, (6.0.0-RC1-DEV-GIT 2022-03-02) but I get this install error:
 

I searched for "sampleData" in the DB and could not find anything.  Which table is this sampleData in?

When I try and create a new category, I still get this info:
 
 

Export the table #__kunena_version as backup.
Then empty this table and try again to install Kunena