diff --git a/openbis/source/sql/postgresql/migration/migration-062-063.sql b/openbis/source/sql/postgresql/migration/migration-062-063.sql
index 2c1a25810ec175f0ff8955f282c63f8d285612df..f4b36a44b2e1c6157c0cf617393c06ae6c61ad56 100644
--- a/openbis/source/sql/postgresql/migration/migration-062-063.sql
+++ b/openbis/source/sql/postgresql/migration/migration-062-063.sql
@@ -1,6 +1,13 @@
 -- Migration from 062 to 063
 
--- connect wells to experiments of their plates (screening specific)  
+--------------------------------------------------------------------------------------
+--------------------------------------------------------------------------------------
+-- Screening specific migration. Nothing will be performed on openBIS databases 
+-- which are not screening specific.
+--------------------------------------------------------------------------------------
+--------------------------------------------------------------------------------------
+
+-- connect wells to experiments of their plates
 UPDATE samples 
 	SET expe_id = sc.expe_id
 	FROM samples sc, sample_types sct