Solved A glitch in the number of posts in the topic

Hallo alle,

When editing one of the posts in a topic , the following situation occurred.

1. I don't know if it matters, but I've made changes to the post several times in a row and memorized them.

2. At some point, I saw that instead of the remembered post, the editing form with the post was still displayed on the computer screen.

3. I began to look at the screen and saw a message at the top above the editing form: "Data too long for column 'last_post_message' at row 1". 

4. Repeated attempts to edit and close the post led to the same result.
Thank God, when opening the topic again, it turned out that all the changes were preserved.

5. However,
a) the number of posts in the topic has not changed (that is, the new post has not been taken into account
b) When clicking on the "Last" button on the Forum -> Recent Topics page, the move takes place to the previous post (which has not had a problem yet).

How can I fix this situation, or is it a bug in the program?

Thanks

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It would probably be correct to title this topic:
"It is impossible to finish editing the post."
Excuse me

...
P.S. The ability to edit posts in this Kunena forum has disappeared somewhere. Maybe there is a limited time during which this is possible?

Therefore, here is an addition to the starting post:
In the topic with which the problem occurred, there are 22 posts in total, and the Recent Topics page shows that there are 19 answers.

Have you tried to recount statistics and run diagnostics?

It must be an extremely long text. If you then edit it, you will probably add a lot more, so that the character limit is exceeded. It might help if you change the value of the columns last_post_message and first_post_message in the table #__kunena_topics from TEXT to LONGTEXT.

Thank you.

No, I was afraid to do this, so as not to spoil the data for the Kunena-Team.

rich wrote:

It must be an extremely long text. If you then edit it, you will probably add a lot more, so that the character limit is exceeded.

Thank you. This post is no longer than the others in this topic. The only new thing I can point out is that I've used the "Undo" button quite a few times. Maybe it affects the character limit?

As for the advice:
"It might help if you change the value of the columns last_post_message and first_post_message in the table #__kunena_topics from TEXT to LONGTEXT.

I can try to do that.
But won't these parameters change after an update?
Maybe it's worth doing this at the level of your programs?