[grafana] I need a description of dashboard table

My YunoHost server

Hardware: Dedicated server
YunoHost version: 11.0.x
I have access to my server : in all way
Are you in a special context or did you perform some particular tweaking on your YunoHost instance ? : yes
If yes, please explain: i am working on influxdb2 migration for grafana
If your request is related to an app, specify its name and version: app v1.0~ynh1

Description of my issue

So my request is pretty simple, i have a bug on grafana when trying to save a big dashboard.

After research it’s a db issue ( saving dashboard failed: Error 1406: Data too long for column ‘data’ at row 1 )

MariaDB [grafana]> describe dashboard;
+------------+----------+------+-----+---------+----------------+
| Field      | Type     | Null | Key | Default | Extra          |
+------------+----------+------+-----+---------+----------------+

[...]
| data       | text     | NO   |     | NULL    |                |
[...]
+------------+----------+------+-----+---------+----------------+
17 rows in set (0.001 sec) 

I simply need that someone with an other grafana to run a command to see, it’s a bug of grafana or of my setup…

The command to run is:

echo "DESCRIBE dashboard;" | mysql grafana | grep data

Thanks