Device sensors gets deleted and readded once per week

On a couple of our devices we´ve manually added High and low threshold values on the sensors as they don´t get polled automatically. Mostly this works just fine once the values has been set.

On one of these devices, around once per week all of the sensors gets automatically deleted and readded and I can’t figure out why. The result is that all of the High / Low thresholds have to be set manually again.

I´m not sure what you need or where I should start. I´ve tried to rediscover the device, remove and add it again but same thing happens.

./validate

sudo -u librenms ./validate.php
====================================
Component | Version
--------- | -------
LibreNMS  | 1.48.1-81-g48ed665
DB Schema | 2019_02_10_220000_add_dates_to_fdb (132)
PHP       | 7.2.14-1+ubuntu16.04.1+deb.sury.org+1
MySQL     | 10.0.36-MariaDB-0ubuntu0.16.04.1
RRDTool   | 1.5.5
SNMP      | NET-SNMP 5.7.3
====================================

[OK]    Composer Version: 1.8.4
[OK]    Dependencies up-to-date.
[OK]    Database connection successful
[OK]    Database schema correct

Some example logs

2019-02-25 07:16:43	sensor	HOSTNAME	Sensor Deleted: power cisco-entity-sensor 35773197 Module Mau 0/0/2/3 - Power Rx 0/0/2/3	System
2019-02-25 07:16:43	sensor	HOSTNAME	Sensor Deleted: power cisco-entity-sensor 30573226 Module Mau 0/0/2/2 - Power Rx 0/0/2/2	System
2019-02-25 07:16:43	sensor	HOSTNAME	Sensor Deleted: power cisco-entity-sensor 29234194 Module Mau 0/0/2/1 - Power Tx 0/0/2/1        System

Any help is appreciated, thanks.