# Mender ID Collision

**URL:** <https://hub.mender.io/t/mender-id-collision/740>\
**Category:** General Discussions\
**Created:** [June 22, 2019, 11:19am UTC](https://hub.mender.io/t/mender-id-collision/740 "2019-06-22T11:19:33Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![neoweb](https://avatars.discourse-cdn.com/v4/letter/n/a5b964/32.png) [@neoweb](https://hub.mender.io/u/neoweb)\
**Post date:** [June 22, 2019, 11:19am UTC](https://hub.mender.io/t/mender-id-collision/740/1 "2019-06-22T11:19:33Z")

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It looks like I have a mender ID collision. I have a Raspberry PI with the same serial number/mac.

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**Author:** ![mirzak](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/mirzak/32/2056_2.png) [@mirzak](https://hub.mender.io/u/mirzak)\
**Post date:** [June 24, 2019, 7:00am UTC](https://hub.mender.io/t/mender-id-collision/740/2 "2019-06-24T07:00:36Z")

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Identity has to unique and you can customize it making sure it is,

[https://docs.mender.io/2.0/client-configuration/identity](https://docs.mender.io/2.0/client-configuration/identity)