This seems to be the problem, it's already fixed (it was fixed before you ran this).

[2026/10/09 20:25:54 +0000] discovery.php(2808760): ====== Initial schema install from db_schema_mysql.sql ==============
[2026/10/09 20:25:54 +0000] discovery.php(2808760): Command: /usr/bin/mysql -u'observium' -p'***' -h'localhost' -D 'observium' < '/opt/observium/update/db_schema_mysql.sql'
[2026/10/09 20:25:54 +0000] discovery.php(2808760): Exit code: 1
[2026/10/09 20:25:54 +0000] discovery.php(2808760): Runtime: 0.04216194152832
[2026/10/09 20:25:54 +0000] discovery.php(2808760): Error: --------------
CREATE TABLE `cache` (
`cache_key` varchar(255) NOT NULL,
`cache_value` longtext,
`cache_expires` timestamp NULL DEFAULT NULL,
`created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
`updated_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci
--------------

ERROR 1273 (HY000) at line 529: Unknown collation: 'utf8mb4_0900_ai_ci'

This is mariadb vs mysql nonsense.

Is there any reason your install tried to insert a new database on the 9th? oO

It'll probably install correctly if you remove the database and run the current version of the code, but if you previously had a database, it seems to be gone.

adam.

Repsher, Brian via observium wrote on 2026-10-14 8:12 PM:

I noticed some strange behavior with alerts after doing a recent update. I have the Professional subscription.

I looked in the update-errors.log and saw many errors. Have not had any issues in many years so was surprised I mucked up the upgrade.

Looking for some direction on solving these issues. I'm comfortable using mysql and can make changes.

I attached the log. Nothing concerning in the other

Brian Repsher

Sr. Staff QA Engineer

2400 Ogden Ave Ste 180

Lisle IL 60503

Office: 847-561-8452
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