diff --git a/src/main/java/org/codelibs/fess/app/web/admin/upgrade/AdminUpgradeAction.java b/src/main/java/org/codelibs/fess/app/web/admin/upgrade/AdminUpgradeAction.java
index 45b514c1d..31012d470 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/upgrade/AdminUpgradeAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/upgrade/AdminUpgradeAction.java
@@ -35,9 +35,7 @@ import org.codelibs.fess.es.config.exbhv.RoleTypeBhv;
 import org.codelibs.fess.es.config.exbhv.WebConfigBhv;
 import org.codelibs.fess.es.config.exbhv.WebConfigToRoleBhv;
 import org.codelibs.fess.es.user.exbhv.RoleBhv;
-import org.codelibs.fess.util.UpgradeUtil;
 import org.elasticsearch.action.ActionListener;
-import org.elasticsearch.client.IndicesAdminClient;
 import org.lastaflute.web.Execute;
 import org.lastaflute.web.response.HtmlResponse;
 import org.lastaflute.web.ruts.process.ActionRuntime;
@@ -51,13 +49,7 @@ public class AdminUpgradeAction extends FessAdminAction {
     //
     private static final Logger logger = LoggerFactory.getLogger(AdminUpgradeAction.class);
 
-    private static final String VERSION_11_0 = "11.0";
-
-    private static final String VERSION_11_1 = "11.1";
-
-    private static final String VERSION_11_2 = "11.2";
-
-    private static final String VERSION_11_3 = "11.3";
+    // private static final String VERSION_12_0 = "12.0";
 
     // ===================================================================================
     //                                                                           Attribute
@@ -143,12 +135,10 @@ public class AdminUpgradeAction extends FessAdminAction {
         });
         verifyToken(() -> asIndexHtml());
 
-        if (VERSION_11_0.equals(form.targetVersion)) {
+        /*
+        if (VERSION_12_0.equals(form.targetVersion)) {
             try {
-                upgradeFrom11_0();
-                upgradeFrom11_1();
-                upgradeFrom11_2();
-                upgradeFrom11_3();
+                upgradeFrom12_0();
                 upgradeFromAll();
 
                 saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
@@ -156,109 +146,20 @@ public class AdminUpgradeAction extends FessAdminAction {
                 systemHelper.reloadConfiguration();
             } catch (final Exception e) {
                 logger.warn("Failed to upgrade data.", e);
-                saveError(messages -> messages.addErrorsFailedToUpgradeFrom(GLOBAL, VERSION_11_0, e.getLocalizedMessage()));
-            }
-        } else if (VERSION_11_1.equals(form.targetVersion)) {
-            try {
-                upgradeFrom11_1();
-                upgradeFrom11_2();
-                upgradeFrom11_3();
-                upgradeFromAll();
-
-                saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
-
-                systemHelper.reloadConfiguration();
-            } catch (final Exception e) {
-                logger.warn("Failed to upgrade data.", e);
-                saveError(messages -> messages.addErrorsFailedToUpgradeFrom(GLOBAL, VERSION_11_1, e.getLocalizedMessage()));
-            }
-        } else if (VERSION_11_2.equals(form.targetVersion)) {
-            try {
-                upgradeFrom11_2();
-                upgradeFrom11_3();
-                upgradeFromAll();
-
-                saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
-
-                systemHelper.reloadConfiguration();
-            } catch (final Exception e) {
-                logger.warn("Failed to upgrade data.", e);
-                saveError(messages -> messages.addErrorsFailedToUpgradeFrom(GLOBAL, VERSION_11_2, e.getLocalizedMessage()));
-            }
-        } else if (VERSION_11_3.equals(form.targetVersion)) {
-            try {
-                upgradeFrom11_3();
-                upgradeFromAll();
-
-                saveInfo(messages -> messages.addSuccessStartedDataUpdate(GLOBAL));
-
-                systemHelper.reloadConfiguration();
-            } catch (final Exception e) {
-                logger.warn("Failed to upgrade data.", e);
-                saveError(messages -> messages.addErrorsFailedToUpgradeFrom(GLOBAL, VERSION_11_3, e.getLocalizedMessage()));
+                saveError(messages -> messages.addErrorsFailedToUpgradeFrom(GLOBAL, VERSION_12_0, e.getLocalizedMessage()));
             }
         } else {
             saveError(messages -> messages.addErrorsUnknownVersionForUpgrade(GLOBAL));
         }
+        */
+        saveError(messages -> messages.addErrorsUnknownVersionForUpgrade(GLOBAL));
         return redirect(getClass());
     }
 
-    private void upgradeFrom11_0() {
-    }
-
-    private void upgradeFrom11_1() {
-        final IndicesAdminClient indicesClient = fessEsClient.admin().indices();
-        final String configIndex = ".fess_config";
-
-        // update mapping
-        UpgradeUtil.addFieldMapping(indicesClient, configIndex, "thumbnail_queue", "thumbnail_id",
-                "{\"properties\":{\"thumbnail_id\":{\"type\":\"keyword\"}}}");
-    }
-
-    private void upgradeFrom11_2() {
-        final IndicesAdminClient indicesClient = fessEsClient.admin().indices();
-        final String configIndex = ".fess_config";
-        final String searchLogIndex = "fess_log";
-
-        // update mapping
-        UpgradeUtil.addMapping(indicesClient, configIndex, "related_content", "fess_indices/.fess_config");
-        UpgradeUtil.addMapping(indicesClient, configIndex, "related_query", "fess_indices/.fess_config");
-
-        // update mapping
-        if (UpgradeUtil.addFieldMapping(indicesClient, searchLogIndex, "search_log", "virtualHost",
-                "{\"properties\":{\"virtualHost\":{\"type\":\"keyword\"}}}")) {
-            UpgradeUtil.putMapping(indicesClient, searchLogIndex, "search_log", "{\"dynamic_templates\": ["
-                    + "{\"search_fields\": {\"path_match\": \"searchField.*\",\"mapping\": {\"type\": \"keyword\"}}}"//
-                    + "]}");
-        }
-        UpgradeUtil.addFieldMapping(indicesClient, configIndex, "web_config", "virtualHost",
-                "{\"properties\":{\"virtualHost\":{\"type\":\"keyword\"}}}");
-        UpgradeUtil.addFieldMapping(indicesClient, configIndex, "data_config", "virtualHost",
-                "{\"properties\":{\"virtualHost\":{\"type\":\"keyword\"}}}");
-        UpgradeUtil.addFieldMapping(indicesClient, configIndex, "file_config", "virtualHost",
-                "{\"properties\":{\"virtualHost\":{\"type\":\"keyword\"}}}");
-        UpgradeUtil.addFieldMapping(indicesClient, configIndex, "key_match", "virtualHost",
-                "{\"properties\":{\"virtualHost\":{\"type\":\"keyword\"}}}");
-        UpgradeUtil.addFieldMapping(indicesClient, configIndex, "label_type", "virtualHost",
-                "{\"properties\":{\"virtualHost\":{\"type\":\"keyword\"}}}");
-    }
-
-    private void upgradeFrom11_3() {
-        final IndicesAdminClient indicesClient = fessEsClient.admin().indices();
-        final String configIndex = ".fess_config";
-
-        UpgradeUtil.addFieldMapping(indicesClient, configIndex, "related_content", "sortOrder",
-                "{\"properties\":{\"sortOrder\":{\"type\":\"integer\"}}}");
+    private void upgradeFrom12_0() {
     }
 
     private void upgradeFromAll() {
-        final IndicesAdminClient indicesClient = fessEsClient.admin().indices();
-        final String crawlerIndex = fessConfig.getIndexDocumentCrawlerIndex();
-
-        // .crawler
-        if (UpgradeUtil.existsIndex(indicesClient, crawlerIndex, true, true)) {
-            UpgradeUtil.deleteIndex(indicesClient, crawlerIndex, response -> {});
-        }
     }
 
     private boolean startReindex(final boolean replaceAliases) {
diff --git a/src/main/webapp/WEB-INF/view/admin/upgrade/admin_upgrade.jsp b/src/main/webapp/WEB-INF/view/admin/upgrade/admin_upgrade.jsp
index 497e57894..e2e80db55 100644
--- a/src/main/webapp/WEB-INF/view/admin/upgrade/admin_upgrade.jsp
+++ b/src/main/webapp/WEB-INF/view/admin/upgrade/admin_upgrade.jsp
@@ -22,6 +22,14 @@
 			<section class="content">
 				<div class="row">
 					<la:form action="/admin/upgrade/">
+						<%-- Message: BEGIN --%>
+						<div class="col-md-12">
+							<la:info id="msg" message="true">
+								<div class="alert alert-info">${msg}</div>
+							</la:info>
+							<la:errors />
+						</div>
+						<%-- Message: END --%>
 						<div class="col-md-12">
 							<div class="box box-primary">
 								<div class="box-header with-border">
@@ -31,23 +39,12 @@
 								</div>
 								<!-- /.box-header -->
 								<div class="box-body">
-									<%-- Message: BEGIN --%>
-									<div>
-										<la:info id="msg" message="true">
-											<div class="alert alert-info">${msg}</div>
-										</la:info>
-										<la:errors />
-									</div>
-									<%-- Message: END --%>
 									<div class="form-group">
 										<label for="targetVersion" class="col-sm-3 control-label"><la:message key="labels.target_version" /></label>
 										<div class="col-sm-9">
 											<la:errors property="targetVersion" />
 											<la:select styleId="targetVersion" property="targetVersion" styleClass="form-control">
-												<la:option value="11.0">11.0</la:option>
-												<la:option value="11.1">11.1</la:option>
-												<la:option value="11.2">11.2</la:option>
-												<la:option value="11.3">11.3</la:option>
+												<la:option value="-">-</la:option>
 											</la:select>
 										</div>
 									</div>
@@ -74,14 +71,6 @@
 								</div>
 								<!-- /.box-header -->
 								<div class="box-body">
-									<%-- Message: BEGIN --%>
-									<div>
-										<la:info id="msg" message="true">
-											<div class="alert alert-info">${msg}</div>
-										</la:info>
-										<la:errors />
-									</div>
-									<%-- Message: END --%>
 									<div class="form-group">
 										<label for="replaceAliases" class="col-sm-3 control-label"><la:message
 												key="labels.replace_aliases" /></label>