Throw parsing error if fuzzy query contains multiple fields in its short version

core/src/main/java/org/elasticsearch/index/query/FuzzyQueryBuilder.java

@@ -309,6 +309,10 @@ public class FuzzyQueryBuilder extends AbstractQueryBuilder<FuzzyQueryBuilder> i
                     }
                 }
             } else {
+                if (fieldName != null) {
+                    throw new ParsingException(parser.getTokenLocation(), "[fuzzy] query doesn't support multiple fields, found ["
+                            + fieldName + "] and [" + parser.currentName() + "]");
+                }
                 fieldName = parser.currentName();
                 value = parser.objectBytes();
             }

core/src/test/java/org/elasticsearch/index/query/FuzzyQueryBuilderTests.java

@@ -169,5 +169,15 @@ public class FuzzyQueryBuilderTests extends AbstractQueryTestCase<FuzzyQueryBuil
 
         ParsingException e = expectThrows(ParsingException.class, () -> parseQuery(json));
         assertEquals("[fuzzy] query doesn't support multiple fields, found [message1] and [message2]", e.getMessage());
+
+        String shortJson = "{\n" +
+                "  \"fuzzy\" : {\n" +
+                "    \"message1\" : \"this is a test\",\n" +
+                "    \"message2\" : \"value\" : \"this is a test\"\n" +
+                "  }\n" +
+                "}";
+
+        e = expectThrows(ParsingException.class, () -> parseQuery(shortJson));
+        assertEquals("[fuzzy] query doesn't support multiple fields, found [message1] and [message2]", e.getMessage());
     }
 }