# Vega tree error key is null
**URL:** https://discuss.elastic.co/t/vega-tree-error-key-is-null/313946
**Category:** Kibana
**Tags:** vega
**Created:** [September 8, 2022, 6:15am UTC](https://discuss.elastic.co/t/vega-tree-error-key-is-null/313946 "2022-09-08T06:15:42Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Alice\_Ionescu](https://discuss.elastic.co/u/Alice_Ionescu)
#### Post date: [September 8, 2022, 6:15am UTC](https://discuss.elastic.co/t/vega-tree-error-key-is-null/313946/1 "2022-09-08T06:15:42Z")
Hello,
I am trying to create a vega tree visualization. I am not sure how to complete the starting node.
I've tried to put null, -, but nothing works. If the parent of the last node is null I am getting error \_.\_source.organizations.original.attributes.parent.objectGUID is null (that means that the key is null). If I put - then an error like missing key appears.
Can you suggest what to do, or what property should I change?
I am using vega tree based on an index.
Thanks!
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [October 6, 2022, 6:15am UTC](https://discuss.elastic.co/t/vega-tree-error-key-is-null/313946/2 "2022-10-06T06:15:55Z")
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