# Illegal combination of \[copy\_to\] and \[nested\] mappings: \[copy\_to\]
**URL:** https://discuss.elastic.co/t/illegal-combination-of-copy-to-and-nested-mappings-copy-to/140690
**Category:** Elasticsearch
**Created:** [July 19, 2018, 8:31am UTC](https://discuss.elastic.co/t/illegal-combination-of-copy-to-and-nested-mappings-copy-to/140690 "2018-07-19T08:31:15Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Syed\_ali\_abbas\_shah](https://discuss.elastic.co/u/Syed_ali_abbas_shah)
#### Post date: [July 19, 2018, 8:31am UTC](https://discuss.elastic.co/t/illegal-combination-of-copy-to-and-nested-mappings-copy-to/140690/1 "2018-07-19T08:31:15Z")
I am facing an error for following mapping and my version is current 6.3
{
"error": {
"root\_cause": [
{
"type": "illegal\_argument\_exception",
"reason": "Illegal combination of [copy\_to] and [nested] mappings: [copy\_to] may only copy data to the current nested document or any of its parents, however one [copy\_to] directive is trying to copy data from nested object [null] to [teams]"
}
],
"type": "illegal\_argument\_exception",
"reason": "Illegal combination of [copy\_to] and [nested] mappings: [copy\_to] may only copy data to the current nested document or any of its parents, however one [copy\_to] directive is trying to copy data from nested object [null] to [teams]"
},
"status": 400
}
``PUT twitter/\_mapping/doc/
{
"properties": {
"priority": {
"type": "integer",
"copy\_to": "teams.priority"
},
"teams": {
"type": "nested",
"properties":{
"id": {
"type": "integer",
"index": true
},
"priority": {
"type": "integer",
"index": true
}
}
}
}
}
``
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [August 16, 2018, 8:31am UTC](https://discuss.elastic.co/t/illegal-combination-of-copy-to-and-nested-mappings-copy-to/140690/2 "2018-08-16T08:31:19Z")
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