# Error occurred during npm prune TypeError

**URL:** <https://community.homey.app/t/error-occurred-during-npm-prune-typeerror/43209>\
**Category:** Questions & Help\
**Created:** [February 18, 2021, 8:03am UTC](https://community.homey.app/t/error-occurred-during-npm-prune-typeerror/43209 "2021-02-18T08:03:05Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![YI\_KUAN\_HSIN](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/yi_kuan_hsin/32/36104_2.png) [@YI\_KUAN\_HSIN](https://community.homey.app/u/YI_KUAN_HSIN)\
**Post date:** [February 18, 2021, 8:03am UTC](https://community.homey.app/t/error-occurred-during-npm-prune-typeerror/43209/1 "2021-02-18T08:03:05Z")

</div>

Hello everyone,

I followed the “Getting Started” to try to create my first project,  
and when I run “homey app run” to get some error see long below:

```
user@EVUb-11218:~/work/com.company.myapp$ sudo homey app run
✓ Pre-processing app...
✓ Running plugins...
✓ Running plugin `compose`...
✓ Plugin `compose` finished
✓ Validating app...
✓ Homey App validated successfully against level `debug`
✓ Packing Homey App...
✓ Pruning dev dependencies...
✖ Error occurred during npm prune TypeError: prunePathsJson.removed.map is not a function
    at Function.getPrunePaths (/usr/local/lib/node_modules/homey/lib/Modules/NpmCommands.js:106:49)
    at processTicksAndRejections (node:internal/process/task_queues:94:5)
    at async /usr/local/lib/node_modules/homey/lib/App/index.js:696:26
 — App size: 25.23 MB
✓ Installing Homey App on `YI's Homey` (http://192.168.81.245:80)...
✖ An unkown error has occured [incompatible_app_version]

```

My environment blow:  
Ubuntu: 18.04.5 LTS  
node js: v15.9.0  
npm: 7.5.4  
homey: 2.9.7

app.json:  
1.compatibility: \>=5.0.0  
2.sdk: 3

homey system (device):  
1.release: 4.14.15-g3c513a6eca  
2. nodeVersion: v12.16.1  
3.homeyVersion: 4.2.0

Also, my homey system can’t use SDK v3 (my version 4.2.0), have someway can update my homey device version?

Please tell me how to fix them, thanks so much.

---

<div class="post-metadata">

**Author:** ![robertklep](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/robertklep/32/160628_2.png) [@robertklep](https://community.homey.app/u/robertklep)\
**Post date:** [February 18, 2021, 8:35am UTC](https://community.homey.app/t/error-occurred-during-npm-prune-typeerror/43209/2 "2021-02-18T08:35:03Z")

</div>

`prunePathsJson.removed.map` is a [known issue](https://github.com/athombv/homey-apps-sdk-issues/issues/161) with the `homey` command.

The new v5 firmware is being rolled out, so you have to wait for a bit before it becomes available for you.