diff --git a/include/NebulaService.h b/include/NebulaService.h
index 5458ef81fb..bb283d8085 100644
--- a/include/NebulaService.h
+++ b/include/NebulaService.h
@@ -159,7 +159,7 @@ public:
      */
     static std::string shared_db_version()
     {
-        return "7.0.0";
+        return "6.6.0";
     }
 
     /**
@@ -168,7 +168,7 @@ public:
      */
     static std::string local_db_version()
     {
-        return "7.0.0";
+        return "6.6.0";
     }
 
     /**
diff --git a/src/onedb/database_schema.rb b/src/onedb/database_schema.rb
index e9f25bd0c4..5c6cb63db0 100644
--- a/src/onedb/database_schema.rb
+++ b/src/onedb/database_schema.rb
@@ -132,8 +132,8 @@ class OneDBBacKEnd
         }
     }
 
-    LATEST_DB_VERSION = '7.0.0'
-    LATEST_LOCAL_DB_VERSION = '7.0.0'
+    LATEST_DB_VERSION = '6.6.0'
+    LATEST_LOCAL_DB_VERSION = '6.6.0'
 
     def get_schema(type, version = nil)
         if !version