# Undoing the :component designation

**URL:** <https://forum.datomic.com/t/undoing-the-component-designation/1335>\
**Category:** Datomic Pro\
**Created:** [January 27, 2020, 7:13pm UTC](https://forum.datomic.com/t/undoing-the-component-designation/1335 "2020-01-27T19:13:16Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![apopelo](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.datomic.com/apopelo/32/313_2.png) [@apopelo](https://forum.datomic.com/u/apopelo)\
**Post date:** [February 5, 2020, 8:45pm UTC](https://forum.datomic.com/t/undoing-the-component-designation/1335/7 "2020-02-05T20:45:36Z")

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Hi, I had related question to component feature [The same entity can be referenced by other entities through attribute which is component](https://forum.datomic.com/t/the-same-entity-can-be-referenced-by-other-entities-through-attribute-which-is-component/1302/2)

Looks like we need to have a custom validation done before to check that component entity does not belong to another one

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_[View the full topic](https://forum.datomic.com/t/undoing-the-component-designation/1335)._