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---
mapped_pages:
- https://www.elastic.co/guide/en/elasticsearch/client/curator/current/option_preserve_existing.html
---
# preserve_existing [option_preserve_existing]
```yaml
action: index_settings
description: "Change settings for selected indices"
options:
index_settings:
index:
refresh_interval: 5s
ignore_unavailable: False
preserve_existing: False
filters:
- filtertype: ...
```
This setting must be either `True` or `False`.
If `preserve_existing` is set to `True`, and the configuration attempts to push a setting to an index that already has any value for that setting, the existing setting will be preserved, and remain unchanged.
The default value of this setting is `False`
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