# KillDuplicatesPreserveFields

The name of IDX fields that IDOL Server must copy to a newer copy of the same document, when it performs KillDuplicates operations.

You can override this parameter for an index action by using the `KillDuplicatesPreserveFields` index action parameter.

Type: | String
Default: |
Required: | No
Configuration Section: | Server
Example: | `KillDuplicatesPreserveFields=*/SAVEDATA`
See Also: | KillDuplicates KillDuplicatesChecksumField

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