How to resolve In-memory PM2 is out-of-date

Amazon AWS Ubuntu server

~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 16.04.5 LTS
Release:    16.04
Codename:   xenial

Problem: PM2 is out-of-date

$ pm2 list

>>>> In-memory PM2 is out-of-date, do:
>>>> $ pm2 update
In memory PM2 version: 2.4.6
Local PM2 version: 3.0.3

Tried

pm2 update

... works until I reboot

Tried

npm remove pm2 -g
which pm2 
npm install pm2@latest -g
which pm2
sudo reboot

Any pointers?

I had the same problem and could solve it with re-creating the startup script. Try the following steps:

• delete current process

  pm2 delete nameOfProcess
  

• unload current startup script

  pm2 unstartup systemd
  

• update pm2

  pm2 update
  

• enable startup script

  pm2 startup //copy paste the output
  

• start process again

  pm2 start nameOfProcess
  

• save current config

  pm2 save