Question Unsuccesfull Migration to Joomla 4

Rich, I have been trying to find the latest topics on migrating Joomla 3 to Joomla 4 to see if my issue has already been addressed, but I couldn't find anything.Migration to Joomla 4 is impossible because there are plugins under Joomla 3 that are difficult to remove. The helpdesk of my provider gave up on it.I have decided to create a fresh Joomla 4 site, and I have succeeded in doing so. Now, I am at the point of installing Kunena 6.1.1. Under Joomla 3, I had Kunena 5.2.12 with Crypsis.My question is, can I transfer the Kunena tables from 5.2.12 to Kunena 6.1.1 using a backup? In the backup, I would include only the Kunena and user tables. Additionally, I would transfer the media folder.Will that work, and what are the potential issues?"

1. you have to import the Joomla user tables (without your Joomla users you have no Kunena users)
2. check in the backend System -> Database and update the structure
3. import all Kunena 5.2 tables
4. install Kunena 6.1.x
5. create the Kunena menu and install the sample files (see here)
6. import your avatars and attachments from the media folder

Thanks, quite clear and confirms my plan.

Rich, the implementation went according to plan. Kunena 6 is now running on a test location. I noticed that during the installation of Kunena, the tables were converted, which probably means that I won't be able to transfer the newer tables from production when the test location is ready. It will take some time before the template settings are correct

Yes, that is correct, because for Kunena 6.x the tables need to be adapted. It is likely that some posts will be added to your live site until the new test site is set up, so you should migrate these tables on the day of the move.
This can also be done on a second clean test site. Then remove the Kunena tables from the first finished test site and import the current tables.

Rich, That's a good idea to have a second clean site just to convert the Kunena and User tables from the life site and thereafter include them in the test site. Table for the template/menu should be Okay in the testsite 1.