Setting index cannot be modified for field name – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.9

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Briefly, this error occurs when an attempt is made to modify the ‘index’ setting of an existing field in Elasticsearch. This is not allowed as Elasticsearch doesn’t support changing the ‘index’ setting of a field once it’s been created. To resolve this issue, you can either create a new index with the desired settings and reindex your data, or add a new field to the existing index with the correct ‘index’ setting. Remember to update your queries and applications to use the new field or index as necessary.

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This guide will help you check for common problems that cause the log ” Setting [index] cannot be modified for field [” + name + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugins, index.

Log Context

Log “Setting [index] cannot be modified for field [” + name + “]” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 // tweaking these settings is no longer allowed; the entire purpose of murmur3 fields is to store a hash
 if (node.get("doc_values") != null) {
 throw new MapperParsingException("Setting [doc_values] cannot be modified for field [" + name + "]");
 if (node.get("index") != null) {
 throw new MapperParsingException("Setting [index] cannot be modified for field [" + name + "]");
 }  TypeParsers.parseField(builder; name; node; parserContext);  return builder;


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