# Parent deck case mismatch causes errors

**URL:** <https://forums.ankiweb.net/t/parent-deck-case-mismatch-causes-errors/2028>\
**Category:** Syncing & AnkiWeb\
**Created:** [August 8, 2020, 1:38am UTC](https://forums.ankiweb.net/t/parent-deck-case-mismatch-causes-errors/2028 "2020-08-08T01:38:07Z")\
**Posts on this page:** 2\
**Page:** 1

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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:** [August 8, 2020, 1:38am UTC](https://forums.ankiweb.net/t/parent-deck-case-mismatch-causes-errors/2028/1 "2020-08-08T01:38:08Z")

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Originally posted by @IMBK01:

> [@On another topic](https://forums.ankiweb.net/t/2027/1):
>
> Hi, I also have this problem, but the instructions above didn’t help me. It still shows 500 internal server error. Probably my decks are too big  
> How can I solve this problem?

The issue is that the parent deck name has been used inconsistently, which older Anki clients (and currently AnkiWeb) don’t support. Eg, you have a deck called Parent, but have then used “parent::child” instead of “Parent::child”. Normally Anki should automatically ensure the case matches for you when you add a deck - which client did you use to add the decks?

If you rename the decks using the latest Anki version so they’re consistent, you should be able to force a full sync to AnkiWeb to fix the issue.

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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, 6:21am UTC](https://forums.ankiweb.net/t/parent-deck-case-mismatch-causes-errors/2028/2 "2023-05-01T06:21:29Z")

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