# Someone else claimed my core?

**URL:** <https://community.particle.io/t/someone-else-claimed-my-core/5294>\
**Category:** Troubleshooting\
**Created:** [June 23, 2014, 6:15pm UTC](https://community.particle.io/t/someone-else-claimed-my-core/5294 "2014-06-23T18:15:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![mcyboran](https://avatars.discourse-cdn.com/v4/letter/m/ac8455/32.png) [@mcyboran](https://community.particle.io/u/mcyboran)\
**Post date:** [June 23, 2014, 6:15pm UTC](https://community.particle.io/t/someone-else-claimed-my-core/5294/1 "2014-06-23T18:15:52Z")

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I have my core breathing, but I cannot claim it. There is another employee here that is using some Spark cores. Is it possible that he has claimed without knowing it becuse he is on the same wifi? How do I claim the core?

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**Author:** ![Dave](https://sea2.discourse-cdn.com/flex026/user_avatar/community.particle.io/dave/32/181_2.png) [@Dave](https://community.particle.io/u/Dave)\
**Post date:** [June 23, 2014, 6:19pm UTC](https://community.particle.io/t/someone-else-claimed-my-core/5294/2 "2014-06-23T18:19:49Z")

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Hi @mcyboran,

If you claimed your cores around the same time using the mobile apps, it’s very possible they claimed your core. He can login to [spark.io/build](http://spark.io/build), or use the spark-cli ( [https://github.com/spark/spark-cli](https://github.com/spark/spark-cli) ) to unclaim the core.

In the IDE -\> click on the cores icon, click on the right arrow by the core, and then click “REMOVE CORE”.

In the CLI -\> type

```auto
spark list
spark core remove the_device_id
# then type yes

```

Thanks!  
David