Hi,
I create a category, it is saved, but there is no category in the tab. I go to PHP. My admin find the _k2_categories table and see the created category, and the categories that were previously created. I understand it is not assigned an ID to this category. What needs to be done to assign an id to a category? Help me please.
In attach error screenshots.

Hi,
Thanks for such method! But I have a lot of data in K2 that Joomla itself. Since a very large portal! What other solutions are there for this problem?

Hi, Thanks for the tip.
There was a problem in the database, apparently it was not updated correctly before, the tables in the database were without the editing function. But I fixed it, and transferred it to the new Joomla and K2.