# Delete alias
**URL:** https://discuss.elastic.co/t/delete-alias/32959
**Category:** Elasticsearch
**Created:** [October 26, 2015, 7:38am UTC](https://discuss.elastic.co/t/delete-alias/32959 "2015-10-26T07:38:50Z")
**Posts on this page:** 11
**Page:** 1
### Author:  [@kodermax](https://discuss.elastic.co/u/kodermax)
#### Post date: [October 26, 2015, 7:38am UTC](https://discuss.elastic.co/t/delete-alias/32959/1 "2015-10-26T07:38:51Z")
Why When I remove alias, my index removed too?
---
### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [October 26, 2015, 7:39am UTC](https://discuss.elastic.co/t/delete-alias/32959/2 "2015-10-26T07:39:31Z")
No it's not. You are doing something else I think.
---
### Author:  [@kodermax](https://discuss.elastic.co/u/kodermax)
#### Post date: [October 26, 2015, 7:41am UTC](https://discuss.elastic.co/t/delete-alias/32959/3 "2015-10-26T07:41:44Z")
Now I make index "portal" then i make request
```
/POST /_aliases
{
"actions": [
{ "add": { "index": "portal", "alias": "portal_v1" }}
]
}
```
and then i make request
/DELETE /portal\_v1/
and my index portal removed too. why?
---
### Author:  [@kodermax](https://discuss.elastic.co/u/kodermax)
#### Post date: [October 26, 2015, 7:56am UTC](https://discuss.elastic.co/t/delete-alias/32959/4 "2015-10-26T07:56:50Z")
if i have alias poral\_v1,
i can't make request
```
/POST /_aliases
{
"actions": [
{ "add": { "index": "portal", "alias": "portal_v1" }}
]
}
```
i see
```
{
error: "InvalidAliasNameException[[portal] Invalid alias name [portal_v1], an index exists with the same name as the alias]"
status: 400
}
```
---
### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [October 26, 2015, 8:14am UTC](https://discuss.elastic.co/t/delete-alias/32959/5 "2015-10-26T08:14:55Z")
Read the doc on how to remove an alias: [https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-aliases.html#indices-aliases](https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-aliases.html#indices-aliases)
---
### Author:  [@kodermax](https://discuss.elastic.co/u/kodermax)
#### Post date: [October 26, 2015, 10:31am UTC](https://discuss.elastic.co/t/delete-alias/32959/6 "2015-10-26T10:31:41Z")
I understood this theme, but when i reindex data to new index, my new index not save mapping old index, yes?
---
### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [October 26, 2015, 11:30am UTC](https://discuss.elastic.co/t/delete-alias/32959/7 "2015-10-26T11:30:22Z")
I don't understand.
What do you want to do?
---
### Author:  [@kodermax](https://discuss.elastic.co/u/kodermax)
#### Post date: [October 26, 2015, 1:44pm UTC](https://discuss.elastic.co/t/delete-alias/32959/8 "2015-10-26T13:44:48Z")
For example,
I make operations from article [https://www.elastic.co/blog/changing-mapping-with-zero-downtime](https://www.elastic.co/blog/changing-mapping-with-zero-downtime)
and when i reindex data from my\_index\_v1 to my\_index\_v2, mappings of my\_index\_v1 doesn't move to my\_index\_v2.
understand?
---
### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [October 26, 2015, 4:10pm UTC](https://discuss.elastic.co/t/delete-alias/32959/9 "2015-10-26T16:10:07Z")
So what do you want to do?
Reindex from one index to another one and change the mapping ?
Or keep the same mapping ? (if so, why do you want to reindex?)
---
### Author:  [@kodermax](https://discuss.elastic.co/u/kodermax)
#### Post date: [October 27, 2015, 6:10am UTC](https://discuss.elastic.co/t/delete-alias/32959/10 "2015-10-27T06:10:26Z")
i want to, when i cope data from index1 to index2 all mapping from index1 was copied to index2.
it turns out if i want to move all mapings of index 1 to index 2, i must create these mappings on the index2 before reindex data?
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 5, 2017, 11:42pm UTC](https://discuss.elastic.co/t/delete-alias/32959/11 "2017-07-05T23:42:31Z")