Nextcloud update fails

[harpogit]

My YunoHost server : Brique Neutrinet Lime1 Propulsé par YunoHost 11.1.21.4

Description of my issue : Nextcloud 24 to 26 fails, by the web interface

19848 mysqldump: Couldn't execute 'SELECT /*!40001 SQL_NO_CACHE */ `id`, `poll_id`, `user_id`, `vote_option_id`, `vote_option_text`, `vote_answer` FROM `oc_polls_votes`': Lost connection to MySQL server during query (2013)
21401 Could not back up nextcloud
21524 Nothing to save
Backup failed, the upgrade process was aborted.

I don’t know how to go beyond that backup error.
What would be the process if I de-install->re-install Nextcloud ?

Thanks to you all !

[ericg]

No full logs?

[harpogit]

Hi @ericg ,

For the moment, I don’t have any access to my server. So, I can’t access to the logs.
I tried to reboot but nothing else…

I will try again tomorrow evening.

Thank you for your message.

[harpogit]

Hi @ericg ,

Here you will find the log : https://paste.yunohost.org/raw/uhiyagepin
I see that

2023-07-11 16:53:02,962: WARNING - 21989 mysqldump: Couldn't execute 'SELECT /*!40001 SQL_NO_CACHE */ `id`, `poll_id`, `user_id`, `vote_option_id`, `vote_option_text`, `vote_answer` FROM `oc_polls_votes`': Lost connection to MySQL server during query (2013)

But I don’t know why I’m losing the connection to MySQL.

Maybe you could understand.

Thank you !