Search error encountered

Elasticsearch error: Elastica\Exception\ResponseException

failed to create query: {
  "bool" : {
    "must" : [
      {
        "term" : {
          "subjects.id" : {
            "value" : "15527,10746",
            "boost" : 1.0
          }
        }
      },
      {
        "bool" : {
          "should" : [
            {
              "term" : {
                "partOf.id" : {
                  "value" : "408",
                  "boost" : 1.0
                }
              }
            },
            {
              "match" : {
                "slug" : {
                  "query" : "university-archive-miscellaneous-donations-d-numbers",
                  "operator" : "OR",
                  "prefix_length" : 0,
                  "max_expansions" : 50,
                  "fuzzy_transpositions" : true,
                  "lenient" : false,
                  "zero_terms_query" : "NONE",
                  "boost" : 1.0
                }
              }
            }
          ],
          "disable_coord" : false,
          "adjust_pure_negative" : true,
          "boost" : 1.0
        }
      },
      {
        "term" : {
          "publicationStatusId" : {
            "value" : 160,
            "boost" : 1.0
          }
        }
      }
    ],
    "disable_coord" : false,
    "adjust_pure_negative" : true,
    "boost" : 1.0
  }
} [index: atom] [reason: all shards failed]