# No Duplicar Registros

**URL:** <https://community.glideapps.com/t/no-duplicar-registros/55417>\
**Category:** Ask for Help\
**Created:** [December 5, 2022, 4:09am UTC](https://community.glideapps.com/t/no-duplicar-registros/55417 "2022-12-05T04:09:27Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Lucas\_Guzman](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/lucas_guzman/32/50697_2.png) [@Lucas\_Guzman](https://community.glideapps.com/u/Lucas_Guzman)\
**Post date:** [December 5, 2022, 4:09am UTC](https://community.glideapps.com/t/no-duplicar-registros/55417/1 "2022-12-05T04:09:27Z")

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![image](https://us1.discourse-cdn.com/flex002/uploads/glideapps/original/3X/0/4/0440bd5a2264d6819cc1561fada84a5c7271d1a3.png)

Alguien sabe como evitar cargar datos que ya estan registrados anteriormente? Por ejemplo si tengo un cliente ya cargado por su identificación que no me permita registrarlo de nuevo.  
O en su defecto que pueda darme un ejemplo de como usar Array → Duplicated Items.  
Muchas gracia

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<div class="post-metadata">

**Author:** ![Darren\_Murphy](https://sea2.discourse-cdn.com/flex002/user_avatar/community.glideapps.com/darren_murphy/32/47326_2.png) [@Darren\_Murphy](https://community.glideapps.com/u/Darren_Murphy)\
**Post date:** [December 5, 2022, 4:14am UTC](https://community.glideapps.com/t/no-duplicar-registros/55417/2 "2022-12-05T04:14:38Z")

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To avoid duplicate items being created, you need to use a [Custom Form](https://community.glideapps.com/t/how-do-i-create-a-custom-form/25014).

To detect duplicate items:

- Create a multiple relation column that matches the column for which you want to detect duplicates to itself.
- Create a rollup column that does a count through the multiple relation
- Any row in the rollup that returns a count greater than 1 is a duplicate