com.fasterxml.jackson.core.JsonGenerationException: Can not write a field name, expecting a value

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Can not write a field name, expecting a value
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Can not write a field name, expecting a value
com.fasterxml.jackson.core.JsonGenerationException: Can not write a field name, expecting a value
at com.fasterxml.jackson.core.JsonGenerator._reportError(JsonGenerator.java:1886)
at org.elasticsearch.common.xcontent.json.JsonXContentGenerator.writeFieldName(JsonXContentGenerator.java:152)
at org.elasticsearch.common.xcontent.XContentBuilder.field(XContentBuilder.java:264)
at org.elasticsearch.common.xcontent.XContentBuilder.field(XContentBuilder.java:255)
at org.elasticsearch.common.xcontent.XContentBuilder.startObject(XContentBuilder.java:169)
at org.elasticsearch.action.ActionWriteResponse$ShardInfo.toXContent(ActionWriteResponse.java:147)
at org.elasticsearch.common.Strings.toString(Strings.java:1103)
at org.elasticsearch.common.Strings.toString(Strings.java:1089)
at java.lang.String.valueOf(String.java:2982)
at java.lang.StringBuilder.append(StringBuilder.java:131)
at com.hophman.onlineshop.behavior.impex.DefaultProductImporter.importCSV(DefaultProductImporter.java:69)
at undefined.OnlineShopApplication.main(OnlineShopApplication.java:13)

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