# Run two versions of ES on machine

**URL:** https://discuss.elastic.co/t/run-two-versions-of-es-on-machine/326985
**Category:** Elasticsearch
**Created:** [March 4, 2023, 3:51pm UTC](https://discuss.elastic.co/t/run-two-versions-of-es-on-machine/326985 "2023-03-04T15:51:31Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![mrodent](https://avatars.discourse-cdn.com/v4/letter/m/65b543/32.png) [@mrodent](https://discuss.elastic.co/u/mrodent)
#### Post date: [March 4, 2023, 4:05pm UTC](https://discuss.elastic.co/t/run-two-versions-of-es-on-machine/326985/2 "2023-03-04T16:05:06Z")

</div>

I found [this recent answer](https://discuss.elastic.co/t/can-i-run-multiple-elasticsearch-instances-in-one-server/321230/4) on the same subject (\*nix OS).

So (having unzipped 8.6.2) I changed all those settings in elasticsearch.yml.

I ran elasticsearch.bat.

Error:

```auto
[2023-03-04T15:59:45,029][ERROR][o.e.b.Elasticsearch] [M17A] fatal exception while booting Elasticsearch
java.lang.RuntimeException: org.elasticsearch.cli.UserException: will not overwrite keystore at [D:\apps\ElasticSearch\elasticsearch-7.10.2\config\elasticsearch.keystore], because this incurs changing the file owner
	at org.elasticsearch.bootstrap.Elasticsearch.initPhase2(Elasticsearch.java:150) ~[elasticsearch-8.6.2.jar:?]
	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:66) ~[elasticsearch-8.6.2.jar:?]
Caused by: org.elasticsearch.cli.UserException: will not overwrite keystore at [D:\apps\ElasticSearch\elasticsearch-7.10.2\config\elasticsearch.keystore], because this incurs changing the file owner
	at org.elasticsearch.common.settings.KeyStoreWrapper.save(KeyStoreWrapper.java:480) ~[elasticsearch-8.6.2.jar:?]
	at org.elasticsearch.common.settings.KeyStoreWrapper.save(KeyStoreWrapper.java:412) ~[elasticsearch-8.6.2.jar:?]
	at org.elasticsearch.common.settings.KeyStoreWrapper.upgrade(KeyStoreWrapper.java:291) ~[elasticsearch-8.6.2.jar:?]
	at org.elasticsearch.common.settings.KeyStoreWrapper.bootstrap(KeyStoreWrapper.java:221) ~[elasticsearch-8.6.2.jar:?]
	at org.elasticsearch.bootstrap.Elasticsearch.initPhase2(Elasticsearch.java:148) ~[elasticsearch-8.6.2.jar:?]
	... 1 more

```

... right: I don't want it to "overwrite keystore at ... \elasticsearch-7.10.2 ...". Why is it using a "key store" from another ES instance? How can I persuade it to make a separate "key store"?

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_[View the full topic](https://discuss.elastic.co/t/run-two-versions-of-es-on-machine/326985)._