pm2 module will be uninstalled twice when use the command of uninstall all

What's going wrong?

When I write a module with such package.json

{
  "name": "myapp",
  "version": "0.8.0",
  "description": "PM2 Module running myapp",
  "apps": [
    {
      "name": "app1",
      "script": "app1.js",
      "restart_delay": 100,
      "max_restarts": 0,
      "error_file": "/app/log/app1-error.log",
      "out_file": "/app/log/app1-out.log"
    },
    {
      "name": "app2",
      "script": "app2.js",
      "restart_delay": 100,
      "max_restarts": 0,
      "time": true,
      "error_file": "/app/log/app2-error.log",
      "out_file": "/app/log/app2-out.log"
    }
  ]
}

When update its code to re-install it, I need uninstall it first. So I use pm2 uninstall all command. But it will uninstall myapp twice.

Supporting information

--- PM2 report ----------------------------------------------------------------
Date                 : Wed Feb 03 2021 19:01:33 GMT+0800 (China Standard Time)
===============================================================================
--- Daemon -------------------------------------------------
pm2d version         : 4.5.4
node version         : 12.20.1
node path            : /root/.tnvm/versions/alinode/v5.18.1/bin/pm2
argv                 : /root/.tnvm/versions/alinode/v5.18.1/bin/node,/root/.tnvm/versions/alinode/v5.18.1/lib/node_modules/pm2/lib/Daemon.js
argv0                : node
user                 : root
uid                  : 0
gid                  : 0
uptime               : 49min
===============================================================================
--- CLI ----------------------------------------------------
local pm2            : 4.5.4
node version         : 12.20.1
node path            : /root/.tnvm/versions/alinode/v5.18.1/bin/pm2
argv                 : /root/.tnvm/versions/alinode/v5.18.1/bin/node,/root/.tnvm/versions/alinode/v5.18.1/bin/pm2,report
argv0                : node
user                 : root
uid                  : 0
gid                  : 0
===============================================================================
--- System info --------------------------------------------
arch                 : x64
platform             : linux
type                 : Linux
cpus                 : Intel Xeon Processor (Cascadelake)
cpus nb              : 16
freemem              : 3800711168
totalmem             : 33732665344
home                 : /root
===============================================================================
--- PM2 list -----------------------------------------------
┌─────┬──────────────────────────┬─────────────┬─────────┬─────────┬──────────┬────────┬──────┬───────────┬──────────┬──────────┬──────────┬──────────┐
│ id  │ name                     │ namespace   │ version │ mode    │ pid      │ uptime │ ↺    │ status    │ cpu      │ mem      │ user     │ watching │
└─────┴──────────────────────────┴─────────────┴─────────┴─────────┴──────────┴────────┴──────┴───────────┴──────────┴──────────┴──────────┴──────────┘
Modules
┌────┬───────────────────────────────────────┬────────────────────┬───────┬──────────┬──────┬──────────┬──────────┬──────────┐
│ id │ module                                │ version            │ pid   │ status   │ ↺    │ cpu      │ mem      │ user     │
├────┼───────────────────────────────────────┼────────────────────┼───────┼──────────┼──────┼──────────┼──────────┼──────────┤
│ 4  │ myapp:app1                            │ 0.8.0              │ 7245  │ online   │ 0    │ 0.5%     │ 32.5mb   │ root     │
│ 5  │ myapp:app2                            │ 0.8.0              │ 7251  │ online   │ 0    │ 0%       │ 28.8mb   │ root     │
│ 2  │ xmn                                   │ N/A                │ 2990  │ online   │ 0    │ 0%       │ 1.2mb    │ root     │
│ 3  │ mytoken:monitor                       │ 0.0.2              │ 2992  │ online   │ 0    │ 0.9%     │ 24.5mb   │ root     │
└────┴───────────────────────────────────────┴────────────────────┴───────┴──────────┴──────┴──────────┴──────────┴──────────┘
===============================================================================
--- Daemon logs --------------------------------------------
/root/.pm2/pm2.log last 20 lines:
PM2        | 2021-02-03T18:12:00: PM2 log: ===============================================================================
PM2        | 2021-02-03T18:12:00: PM2 log: App [myapp:app1:0] starting in -fork mode-
PM2        | 2021-02-03T18:12:00: PM2 log: App [myapp:app2:1] starting in -fork mode-
PM2        | 2021-02-03T18:12:00: PM2 log: App [myapp:app1:0] online
PM2        | 2021-02-03T18:12:00: PM2 log: App [myapp:app2:1] online
PM2        | 2021-02-03T18:12:00: PM2 log: App [xmn:2] starting in -fork mode-
PM2        | 2021-02-03T18:12:00: PM2 log: App [xmn:2] online
PM2        | 2021-02-03T18:12:00: PM2 log: App [mytoken:monitor:3] starting in -fork mode-
PM2        | 2021-02-03T18:12:00: PM2 log: App [mytoken:monitor:3] online
PM2        | 2021-02-03T18:31:01: PM2 log: Stopping app:myapp:app1 id:0
PM2        | 2021-02-03T18:31:01: PM2 log: pid=2969 msg=failed to kill - retrying in 100ms
PM2        | 2021-02-03T18:31:01: PM2 log: App [myapp:app1:0] exited with code [0] via signal [SIGINT]
PM2        | 2021-02-03T18:31:01: PM2 log: pid=2969 msg=process killed
PM2        | 2021-02-03T18:31:03: PM2 log: Stopping app:myapp:app2 id:1
PM2        | 2021-02-03T18:31:03: PM2 log: App [myapp:app2:1] exited with code [0] via signal [SIGINT]
PM2        | 2021-02-03T18:31:03: PM2 log: pid=2975 msg=process killed
PM2        | 2021-02-03T18:32:18: PM2 log: App [myapp:app1:4] starting in -fork mode-
PM2        | 2021-02-03T18:32:18: PM2 log: App [myapp:app2:5] starting in -fork mode-
PM2        | 2021-02-03T18:32:18: PM2 log: App [myapp:app1:4] online
PM2        | 2021-02-03T18:32:18: PM2 log: App [myapp:app2:5] online

Reproduce the issue with the shown package.json and the pm2 uninstall all command, then trace the command's module-uninstall path. Done means each module is uninstalled once and the command completes without attempting to remove the same module twice.