Index: src/libserializer/SerializableContainer.h
===================================================================
diff -u -N -re9d12da97d434708c93b6967971ce265ac933252 -rf01ed9a0279a52c96a7272273ef19e57f7670f4a
--- src/libserializer/SerializableContainer.h	(.../SerializableContainer.h)	(revision e9d12da97d434708c93b6967971ce265ac933252)
+++ src/libserializer/SerializableContainer.h	(.../SerializableContainer.h)	(revision f01ed9a0279a52c96a7272273ef19e57f7670f4a)
@@ -73,10 +73,7 @@
 
 			// ensure all objects have modification flag stripped to avoid unnecessary writing the same data to db again
 			// NOTE: Load() method above should reset modification flag, but storing it in vector will set it again - hence the separate reset
-			for(T& rItem : m_vEntries)
-			{
-				rItem.ResetModifications();
-			}
+			ResetModifications();
 		}
 
 		virtual void InitColumns(const serializer::ISerializerContainerPtr& spContainer) const = 0;
@@ -164,6 +161,28 @@
 			m_vEntries.clear();
 		}
 
+		void ResetModifications()
+		{
+			for(T& rEntry : m_vEntries)
+			{
+				rEntry.ResetModifications();
+			}
+			m_setRemovedObjects.Clear();
+		}
+
+		bool IsModified() const
+		{
+			if(!m_setRemovedObjects.IsEmpty())
+				return true;
+
+			for(const T& rEntry : m_vEntries)
+			{
+				if(rEntry.IsModified())
+					return true;
+			}
+			return false;
+		}
+
 	protected:
 		serializer::object_id_t m_oidLastObjectID = 0;
 		std::vector<T> m_vEntries;