Set 4.2.0 as supported version for upgrade

application/src/main/java/org/thingsboard/server/service/install/DefaultDatabaseSchemaSettingsService.java

@@ -31,7 +31,7 @@ public class DefaultDatabaseSchemaSettingsService implements DatabaseSchemaSetti
     // map of versions from which the upgrade to the current version is possible
     // key - supported version prefix, value - display name
     private static final Map<String, String> SUPPORTED_VERSIONS_FOR_UPGRADE = Map.of(
-//            "4.2.1", "4.2.1.x" // fixme update for 4.2
+            "4.2.0", "4.2.0"
     );
 
     private final ProjectInfo projectInfo;