# How to solve the problem of Sync error 400 message?

**URL:** <https://forums.ankiweb.net/t/how-to-solve-the-problem-of-sync-error-400-message/19794>\
**Category:** Syncing & AnkiWeb\
**Created:** [May 7, 2022, 7:17am UTC](https://forums.ankiweb.net/t/how-to-solve-the-problem-of-sync-error-400-message/19794 "2022-05-07T07:17:41Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Labib200](https://avatars.discourse-cdn.com/v4/letter/l/76d3ee/32.png) [@Labib200](https://forums.ankiweb.net/u/Labib200)\
**Post date:** [May 7, 2022, 7:17am UTC](https://forums.ankiweb.net/t/how-to-solve-the-problem-of-sync-error-400-message/19794/1 "2022-05-07T07:17:41Z")

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How can I solve this problem of Syncing error 400?

 ![Screenshot_20220507-131720](https://us1.discourse-cdn.com/flex002/uploads/anki2/original/2X/c/ccc81864d2a451286b193fd9b33e66bb960f8fbe.png)

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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:** [May 9, 2022, 2:16am UTC](https://forums.ankiweb.net/t/how-to-solve-the-problem-of-sync-error-400-message/19794/2 "2022-05-09T02:16:44Z")

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Using Check Database, then forcing a one-way upload in the preferences screen may help.

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**Author:** ![system](https://us1.discourse-cdn.com/flex002/uploads/anki2/original/1X/8f1279ababc5879d54e4838989f606cfe55af8c7.jpeg) [@system](https://forums.ankiweb.net/u/system)\
**Post date:** [May 1, 2023, 6:12am UTC](https://forums.ankiweb.net/t/how-to-solve-the-problem-of-sync-error-400-message/19794/3 "2023-05-01T06:12:46Z")

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