diff --git a/secondary/blockreader.cpp b/secondary/blockreader.cpp
index 6a397d10..31f251fc 100644
--- a/secondary/blockreader.cpp
+++ b/secondary/blockreader.cpp
@@ -36,6 +36,10 @@ void ColumnInfo_t::Load ( util::FileReader_c & tReader )
 	m_sName = tReader.Read_string();
 	m_eType = (AttrType_e)tReader.Unpack_uint32();
 	m_uCountDistinct = tReader.Unpack_uint32();
+
+	auto iJsonFieldPos = m_sName.find ( "['" );
+	if ( iJsonFieldPos!=std::string::npos )
+		m_sJsonParentName = m_sName.substr ( 0, iJsonFieldPos );
 }
 
 
diff --git a/secondary/blockreader.h b/secondary/blockreader.h
index 45fa9532..2dc71ccd 100644
--- a/secondary/blockreader.h
+++ b/secondary/blockreader.h
@@ -80,6 +80,7 @@ struct ColumnInfo_t
 {
 	common::AttrType_e m_eType = common::AttrType_e::NONE;
 	std::string m_sName;
+	std::string m_sJsonParentName;
 	uint32_t	m_uCountDistinct = 0;
 	bool		m_bEnabled = true;
 
diff --git a/secondary/secondary.cpp b/secondary/secondary.cpp
index c2956a26..2b77e08d 100644
--- a/secondary/secondary.cpp
+++ b/secondary/secondary.cpp
@@ -205,6 +205,8 @@ bool SecondaryIndex_c::Setup ( const std::string & sFile, std::string & sError )
 		}
 
 		m_hAttrs.insert ( { tCol.m_sName, i } );
+		if ( !tCol.m_sJsonParentName.empty() )
+			m_hAttrs.emplace ( tCol.m_sJsonParentName, i );
 	}
 
 	m_iBlocksBase = m_tReader.GetPos();
@@ -276,13 +278,24 @@ bool SecondaryIndex_c::SaveMeta ( std::string & sError )
 	
 void SecondaryIndex_c::ColumnUpdated ( const char * sName )
 {
-	auto tIt = m_hAttrs.find ( sName );
-	if ( tIt==m_hAttrs.end() )
+	int iAttr = GetColumnId ( sName );
+	if ( iAttr==-1 )
 		return;
 		
-	ColumnInfo_t & tCol = m_dAttrs[tIt->second];
+	ColumnInfo_t & tCol = m_dAttrs[iAttr];
 	m_bUpdated |= tCol.m_bEnabled; // already disabled indexes should not cause flush
+	bool bWasUpdated = tCol.m_bEnabled;
 	tCol.m_bEnabled = false;
+
+	// need to disable all fields at this JSON attribute
+	if ( bWasUpdated && !tCol.m_sJsonParentName.empty() )
+	{
+		for ( auto & tSibling : m_dAttrs )
+		{
+			if ( tSibling.m_sJsonParentName==tCol.m_sJsonParentName )
+				tSibling.m_bEnabled = false;
+		}
+	}
 }