Cannot modify setting k on restore – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

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Briefly, this error occurs when you try to modify certain settings during the restore process of an Elasticsearch snapshot. Some settings are not modifiable during a restore operation. To resolve this issue, you can either modify the settings before or after the restore process. Alternatively, you can exclude these settings from the restore operation. It’s important to understand which settings are modifiable during a restore to avoid such errors.

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This guide will help you check for common problems that cause the log ” cannot modify setting [” + k + “] on restore ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: restore.

Log Context

Log “cannot modify setting [” + k + “] on restore” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 return true;
 })).put(normalizedChangeSettings.filter(k -> {
 if (UNMODIFIABLE_SETTINGS.contains(k)) {
 throw new SnapshotRestoreException(snapshot; "cannot modify setting [" + k + "] on restore");
 } else {
 return true;


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