Recently I started getting the following error while running ./validate.php.

$ sudo -u librenms ./validate.php
====================================
Component | Version
--------- | -------
LibreNMS  | 21.8.0-41-g0a76ca4
DB Schema | 2021_08_26_093522_config_value_to_medium_text (217)
PHP       | 7.4.20
Python    | 3.6.8
MySQL     | 10.5.10-MariaDB
RRDTool   | 1.4.8
SNMP      | NET-SNMP 5.7.2
====================================

[OK]    Composer Version: 2.1.6
[OK]    Dependencies up-to-date.
[OK]    Database connection successful
[FAIL]  Database: incorrect column (notifications/datetime)
[FAIL]  Database: incorrect column (users/created_at)
[FAIL]  We have detected that your database schema may be wrong, please report the following to us on Discord (https://t.libren.ms/discord) or the community site (https://t.libren.ms/5gscd):
        [FIX]:
        Run the following SQL statements to fix.
        SQL Statements:
         SET TIME_ZONE='+00:00';
         ALTER TABLE `notifications` CHANGE `datetime` `datetime` timestamp NOT NULL DEFAULT '1970-01-02 00:00:00' ;
         ALTER TABLE `users` CHANGE `created_at` `created_at` timestamp NOT NULL DEFAULT '1970-01-02 00:00:01' ;

Reading online it sounds like some of the recent changes are causing the issue. Looks fairly easy to resolve though.

First we’ll need to get a MySQL prompt. We’ll do that by running

mysql -u librenms -p librenms

It’ll ask use for the librenms user’s mysql password.

Once we have the MySQL prompt we can just copy and paste the commands in.

SET TIME_ZONE='+00:00';
ALTER TABLE `notifications` CHANGE `datetime` `datetime` timestamp NOT NULL DEFAULT '1970-01-02 00:00:00' ;
ALTER TABLE `users` CHANGE `created_at` `created_at` timestamp NOT NULL DEFAULT '1970-01-02 00:00:01' ;

Type ‘quit’ to exit MySQL and lets run the validate script again.

sudo -u librenms ./validate.php

Everything should check out OK.