diff --git a/pe/pe0400.cpp b/pe/pe0400.cpp
index 09a77a705..de9ca65dc 100755
--- a/pe/pe0400.cpp
+++ b/pe/pe0400.cpp
@@ -994,8 +994,9 @@ int TGestione_preventivo_app::write( const TMask& m )
 	{
 		TRiga_documento & row = (TRiga_documento &)doc[i];
 		const int level = row.get_int(RDOC_LEVEL);
+		const TString & row_k = row.get(RDOC_K); 
 
-		if (i == rows || level >= doc[i + 1].get_int(RDOC_LEVEL))
+		if ((row_k.blank()) && (i == rows || level >= doc[i + 1].get_int(RDOC_LEVEL)))
 			row.put(RDOC_K, k);
 	}
 	mask.update_costi_ricavi();
@@ -1014,8 +1015,9 @@ int TGestione_preventivo_app::rewrite( const TMask& m )
 	{
 		TRiga_documento & row = (TRiga_documento &)doc[i];
 		const int level = row.get_int(RDOC_LEVEL);
+		const TString & row_k = row.get(RDOC_K); 
 
-		if (i == rows || level >= doc[i + 1].get_int(RDOC_LEVEL))
+		if ((row_k.blank()) && (i == rows || level >= doc[i + 1].get_int(RDOC_LEVEL)))
 			row.put(RDOC_K, k);
 	}
 	mask.update_costi_ricavi();