# Auto-duplicated Cesium Georeference Causes Massive Performance Issue

**URL:** <https://community.cesium.com/t/auto-duplicated-cesium-georeference-causes-massive-performance-issue/24502>\
**Category:** Cesium for Unreal\
**Created:** [June 2, 2023, 4:12am UTC](https://community.cesium.com/t/auto-duplicated-cesium-georeference-causes-massive-performance-issue/24502 "2023-06-02T04:12:55Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![James\_Barker](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/james_barker/32/8931_2.png) [@James\_Barker](https://community.cesium.com/u/James_Barker)\
**Post date:** [June 2, 2023, 4:12am UTC](https://community.cesium.com/t/auto-duplicated-cesium-georeference-causes-massive-performance-issue/24502/1 "2023-06-02T04:12:55Z")

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Hello, after creating three sublevels, I noticed that, somtimes, CesiumGeoreference[Running Number] is duplicated within the Outliner, up to 20 times. This causes the performance to drop dramatically. So temporarily resolve this, I deleted all except CesiumGeoreference0 which is in my Globe(Persistent) level. I’m not sure what the cause is and I’m hoping someone can shed some light.

I noticed this happens to any sublevel after I change between sublevels in the editor via the Levels panel.

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**Author:** ![Kevin\_Ring](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/kevin_ring/32/2003_2.png) [@Kevin\_Ring](https://community.cesium.com/u/Kevin_Ring)\
**Post date:** [June 2, 2023, 4:37am UTC](https://community.cesium.com/t/auto-duplicated-cesium-georeference-causes-massive-performance-issue/24502/2 "2023-06-02T04:37:31Z")

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Can you explain more how to reproduce this? I tried opening the `04_Main_CesiumSublevels` level in the Cesium for Unreal Samples project and switching repeatedly between levels by double-clicking them in the Levels panel. I didn’t see any extra CesiumGeoreferences.

Thanks,  
Kevin

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**Author:** ![James\_Barker](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/james_barker/32/8931_2.png) [@James\_Barker](https://community.cesium.com/u/James_Barker)\
**Post date:** [June 2, 2023, 7:06am UTC](https://community.cesium.com/t/auto-duplicated-cesium-georeference-causes-massive-performance-issue/24502/3 "2023-06-02T07:06:25Z")

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I’m really not sure how to reproduce it at the moment and I understand that that would be the most valuable information to help with troubleshooting. But I went out for lunch and clicked arround the maps and it happened again. CesiumGeoreference created itself from 36 to 71 in the picture.

 ![image](https://global.discourse-cdn.com/cesium/original/2X/6/6b2c462905e1646cb81e647e9322e2b420ef8a87.jpeg)

![image](https://global.discourse-cdn.com/cesium/original/2X/e/ead94e430303db264a50d8cade909caf9fe4fcbc.png)

I’ll continue observing and paying attention to my flow and will let you know if I find some correlation.

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**Author:** ![Kevin\_Ring](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/kevin_ring/32/2003_2.png) [@Kevin\_Ring](https://community.cesium.com/u/Kevin_Ring)\
**Post date:** [June 2, 2023, 12:37pm UTC](https://community.cesium.com/t/auto-duplicated-cesium-georeference-causes-massive-performance-issue/24502/4 "2023-06-02T12:37:48Z")

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Ok, thanks, let me know what you find.