# Error when attempting to study custom deck

**URL:** <https://forums.ankiweb.net/t/error-when-attempting-to-study-custom-deck/559>\
**Category:** Help\
**Created:** [June 27, 2020, 7:12pm UTC](https://forums.ankiweb.net/t/error-when-attempting-to-study-custom-deck/559 "2020-06-27T19:12:05Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![dae](https://sea2.discourse-cdn.com/flex002/user_avatar/forums.ankiweb.net/dae/32/65_2.png) [@dae](https://forums.ankiweb.net/u/dae)\
**Post date:** [June 29, 2020, 6:26am UTC](https://forums.ankiweb.net/t/error-when-attempting-to-study-custom-deck/559/2 "2020-06-29T06:26:49Z")

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Please delete all custom study/filtered decks you have, and then make sure your AnkiDroid is up to date to prevent this from happening in the future.

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_[View the full topic](https://forums.ankiweb.net/t/error-when-attempting-to-study-custom-deck/559)._