Could not parse watch execution request unexpected object field – How to solve this Elasticsearch exception

Log Context

Log “could not parse watch execution request. unexpected object field [{}]” class name is RestExecuteWatchAction.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 } else {
 if (RESERVED_FIELD_NAMES.contains(currentFieldName)) {
 throw new ElasticsearchParseException("please wrap watch including field [{}] inside a \"watch\"" field"";