# (BUILD 9972) error on starting new game

**URL:** <https://discourse.cataclysmdda.org/t/build-9972-error-on-starting-new-game/22177>\
**Category:** The Garage\
**Created:** [December 8, 2019, 11:48am UTC](https://discourse.cataclysmdda.org/t/build-9972-error-on-starting-new-game/22177 "2019-12-08T11:48:37Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![Ricky\_Van](https://sea2.discourse-cdn.com/flex016/user_avatar/discourse.cataclysmdda.org/ricky_van/32/4666_2.png) [@Ricky\_Van](https://discourse.cataclysmdda.org/u/Ricky_Van)\
**Post date:** [December 8, 2019, 11:48am UTC](https://discourse.cataclysmdda.org/t/build-9972-error-on-starting-new-game/22177/1 "2019-12-08T11:48:38Z")

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so i just updated my experimental build to latest version and make a new playthrough as usual. but when i made a new world and choose Custom Character, an error occured :

src/main\_menu.cpp:779 [bool main\_menu::new\_character\_tab()] Error: item group “mischw” already defined with type “collection”

it appears when the game loads some mods, Aftershock and Pk rebalancing.

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**Author:** ![snipercup](https://sea2.discourse-cdn.com/flex016/user_avatar/discourse.cataclysmdda.org/snipercup/32/6932_2.png) [@snipercup](https://discourse.cataclysmdda.org/u/snipercup)\
**Post date:** [December 8, 2019, 12:26pm UTC](https://discourse.cataclysmdda.org/t/build-9972-error-on-starting-new-game/22177/2 "2019-12-08T12:26:22Z")

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I’m also experiencing this issue. I created a bug report: [https://github.com/CleverRaven/Cataclysm-DDA/issues/35956](https://github.com/CleverRaven/Cataclysm-DDA/issues/35956)

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**Author:** ![Ricky\_Van](https://sea2.discourse-cdn.com/flex016/user_avatar/discourse.cataclysmdda.org/ricky_van/32/4666_2.png) [@Ricky\_Van](https://discourse.cataclysmdda.org/u/Ricky_Van)\
**Post date:** [December 8, 2019, 12:53pm UTC](https://discourse.cataclysmdda.org/t/build-9972-error-on-starting-new-game/22177/3 "2019-12-08T12:53:04Z")

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thank you… i was want to report this to github but such error usually has one or two reports coming up soon.

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**Author:** ![Ragno](https://sea2.discourse-cdn.com/flex016/user_avatar/discourse.cataclysmdda.org/ragno/32/5935_2.png) [@Ragno](https://discourse.cataclysmdda.org/u/Ragno)\
**Post date:** [December 8, 2019, 12:56pm UTC](https://discourse.cataclysmdda.org/t/build-9972-error-on-starting-new-game/22177/4 "2019-12-08T12:56:06Z")

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I have the same problem. but im not actively running those mods, the worst part is i thought it was because a major update, so i deleted my char xD  
 ![Screenshot_3](https://us1.discourse-cdn.com/flex016/uploads/cataclysmdda/original/2X/c/c3c0fddc91ef81f903e7aa6c6b52647166a54f6f.jpeg)

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**Author:** ![MHY-mh](https://sea2.discourse-cdn.com/flex016/user_avatar/discourse.cataclysmdda.org/mhy-mh/32/7691_2.png) [@MHY-mh](https://discourse.cataclysmdda.org/u/MHY-mh)\
**Post date:** [December 8, 2019, 1:05pm UTC](https://discourse.cataclysmdda.org/t/build-9972-error-on-starting-new-game/22177/5 "2019-12-08T13:05:20Z")

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I hope to fix this error as soon as possible, this is definitely bad news for me:(

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**Author:** ![Squirrel-Warrior](https://sea2.discourse-cdn.com/flex016/user_avatar/discourse.cataclysmdda.org/squirrel-warrior/32/290_2.png) [@Squirrel-Warrior](https://discourse.cataclysmdda.org/u/Squirrel-Warrior)\
**Post date:** [December 8, 2019, 1:24pm UTC](https://discourse.cataclysmdda.org/t/build-9972-error-on-starting-new-game/22177/6 "2019-12-08T13:24:00Z")

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Had same problem added this change to my version of aftershock and it booted [Fix afterschock error on load by Fris0uman · Pull Request #35958 · CleverRaven/Cataclysm-DDA · GitHub](https://github.com/CleverRaven/Cataclysm-DDA/pull/35958)  
Also Modular turrets mod need same fix in item\_groups.json at line 96  
Before

> “type”: “item\_group”,  
> “id”: “mischw”,  
> “items”: [[ “garden\_gnome”, 5] ]

After

> “type”: “item\_group”,  
> **“subtype”: “collection”,**  
> “id”: “mischw”,  
> “items”: [[ “garden\_gnome”, 5] ]

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**Author:** ![Ricky\_Van](https://sea2.discourse-cdn.com/flex016/user_avatar/discourse.cataclysmdda.org/ricky_van/32/4666_2.png) [@Ricky\_Van](https://discourse.cataclysmdda.org/u/Ricky_Van)\
**Post date:** [December 8, 2019, 3:27pm UTC](https://discourse.cataclysmdda.org/t/build-9972-error-on-starting-new-game/22177/7 "2019-12-08T15:27:08Z")

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Frish0uman on CDDA Github has fixed this problem thanks to Kevin mentioning it and others putting this issue on github