diff --git a/plugins/mapper-murmur3/src/main/java/org/elasticsearch/index/mapper/murmur3/Murmur3FieldMapper.java b/plugins/mapper-murmur3/src/main/java/org/elasticsearch/index/mapper/murmur3/Murmur3FieldMapper.java
index ce78c75d783..76ffaa16ae6 100644
--- a/plugins/mapper-murmur3/src/main/java/org/elasticsearch/index/mapper/murmur3/Murmur3FieldMapper.java
+++ b/plugins/mapper-murmur3/src/main/java/org/elasticsearch/index/mapper/murmur3/Murmur3FieldMapper.java
@@ -72,12 +72,10 @@ public class Murmur3FieldMapper extends LongFieldMapper {
         @Override
         protected void setupFieldType(BuilderContext context) {
             super.setupFieldType(context);
-            if (context.indexCreatedVersion().onOrAfter(Version.V_2_0_0_beta1)) {
-                fieldType.setIndexOptions(IndexOptions.NONE);
-                defaultFieldType.setIndexOptions(IndexOptions.NONE);
-                fieldType.setHasDocValues(true);
-                defaultFieldType.setHasDocValues(true);
-            }
+            fieldType.setIndexOptions(IndexOptions.NONE);
+            defaultFieldType.setIndexOptions(IndexOptions.NONE);
+            fieldType.setHasDocValues(true);
+            defaultFieldType.setHasDocValues(true);
         }
 
         @Override
@@ -97,17 +95,11 @@ public class Murmur3FieldMapper extends LongFieldMapper {
             Builder builder = new Builder(name);
 
             // tweaking these settings is no longer allowed, the entire purpose of murmur3 fields is to store a hash
-            if (parserContext.indexVersionCreated().onOrAfter(Version.V_2_0_0_beta1)) {
-                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 + "]");
-                }
+            if (node.get("doc_values") != null) {
+                throw new MapperParsingException("Setting [doc_values] cannot be modified for field [" + name + "]");
             }
-
-            if (parserContext.indexVersionCreated().before(Version.V_2_0_0_beta1)) {
-                builder.indexOptions(IndexOptions.DOCS);
+            if (node.get("index") != null) {
+                throw new MapperParsingException("Setting [index] cannot be modified for field [" + name + "]");
             }
 
             parseNumberField(builder, name, node, parserContext);
diff --git a/plugins/mapper-murmur3/src/test/java/org/elasticsearch/index/mapper/murmur3/Murmur3FieldMapperTests.java b/plugins/mapper-murmur3/src/test/java/org/elasticsearch/index/mapper/murmur3/Murmur3FieldMapperTests.java
index 072c0db3e59..621ce4b8a1f 100644
--- a/plugins/mapper-murmur3/src/test/java/org/elasticsearch/index/mapper/murmur3/Murmur3FieldMapperTests.java
+++ b/plugins/mapper-murmur3/src/test/java/org/elasticsearch/index/mapper/murmur3/Murmur3FieldMapperTests.java
@@ -44,11 +44,6 @@ import java.util.Collections;
 
 public class Murmur3FieldMapperTests extends ESSingleNodeTestCase {
 
-    @Override
-    protected Collection<Class<? extends Plugin>> getPlugins() {
-        return pluginList(InternalSettingsPlugin.class);
-    }
-
     MapperRegistry mapperRegistry;
     IndexService indexService;
     DocumentMapperParser parser;
@@ -131,38 +126,4 @@ public class Murmur3FieldMapperTests extends ESSingleNodeTestCase {
             assertTrue(e.getMessage().contains("Setting [index] cannot be modified"));
         }
     }
-
-    public void testDocValuesSettingBackcompat() throws Exception {
-        Settings settings = Settings.builder().put(IndexMetaData.SETTING_VERSION_CREATED, Version.V_1_4_2.id).build();
-        indexService = createIndex("test_bwc", settings);
-        parser = new DocumentMapperParser(indexService.getIndexSettings(), indexService.mapperService(),
-                indexService.analysisService(), indexService.similarityService(), mapperRegistry, indexService::newQueryShardContext);
-        String mapping = XContentFactory.jsonBuilder().startObject().startObject("type")
-            .startObject("properties").startObject("field")
-                .field("type", "murmur3")
-                .field("doc_values", false)
-            .endObject().endObject().endObject().endObject().string();
-
-        DocumentMapper docMapper = parser.parse("type", new CompressedXContent(mapping));
-        Murmur3FieldMapper mapper = (Murmur3FieldMapper)docMapper.mappers().getMapper("field");
-        assertFalse(mapper.fieldType().hasDocValues());
-    }
-
-    public void testIndexSettingBackcompat() throws Exception {
-        Settings settings = Settings.builder().put(IndexMetaData.SETTING_VERSION_CREATED, Version.V_1_4_2.id).build();
-        indexService = createIndex("test_bwc", settings);
-        parser = new DocumentMapperParser(indexService.getIndexSettings(), indexService.mapperService(),
-        indexService.analysisService(), indexService.similarityService(), mapperRegistry, indexService::newQueryShardContext);
-        String mapping = XContentFactory.jsonBuilder().startObject().startObject("type")
-            .startObject("properties").startObject("field")
-            .field("type", "murmur3")
-            .field("index", "not_analyzed")
-            .endObject().endObject().endObject().endObject().string();
-
-        DocumentMapper docMapper = parser.parse("type", new CompressedXContent(mapping));
-        Murmur3FieldMapper mapper = (Murmur3FieldMapper)docMapper.mappers().getMapper("field");
-        assertEquals(IndexOptions.DOCS, mapper.fieldType().indexOptions());
-    }
-
-    // TODO: add more tests
 }