diff --git a/plugins/libkolab/SQL/mysql/2018122700.sql b/plugins/libkolab/SQL/mysql/2018122700.sql
index 08030dd0..519a1e8a 100644
--- a/plugins/libkolab/SQL/mysql/2018122700.sql
+++ b/plugins/libkolab/SQL/mysql/2018122700.sql
@@ -1,10 +1,9 @@
--- remove xml column, and change data format (clear cache needed)
-DELETE FROM `kolab_folders`;
+-- remove xml column
 ALTER TABLE `kolab_cache_contact` DROP COLUMN `xml`;
 ALTER TABLE `kolab_cache_event` DROP COLUMN `xml`;
 ALTER TABLE `kolab_cache_task` DROP COLUMN `xml`;
 ALTER TABLE `kolab_cache_journal` DROP COLUMN `xml`;
 ALTER TABLE `kolab_cache_note` DROP COLUMN `xml`;
 ALTER TABLE `kolab_cache_file` DROP COLUMN `xml`;
 ALTER TABLE `kolab_cache_configuration` DROP COLUMN `xml`;
 ALTER TABLE `kolab_cache_freebusy` DROP COLUMN `xml`;
diff --git a/plugins/libkolab/SQL/oracle/2018122700.sql b/plugins/libkolab/SQL/oracle/2018122700.sql
index 45fccb74..4f4892b4 100644
--- a/plugins/libkolab/SQL/oracle/2018122700.sql
+++ b/plugins/libkolab/SQL/oracle/2018122700.sql
@@ -1,10 +1,9 @@
--- remove xml column, and change data format (clear cache needed)
-DELETE FROM "kolab_folders";
+-- remove xml column
 ALTER TABLE "kolab_cache_contact" DROP COLUMN "xml";
 ALTER TABLE "kolab_cache_event" DROP COLUMN "xml";
 ALTER TABLE "kolab_cache_task" DROP COLUMN "xml";
 ALTER TABLE "kolab_cache_journal" DROP COLUMN "xml";
 ALTER TABLE "kolab_cache_note" DROP COLUMN "xml";
 ALTER TABLE "kolab_cache_file" DROP COLUMN "xml";
 ALTER TABLE "kolab_cache_configuration" DROP COLUMN "xml";
 ALTER TABLE "kolab_cache_freebusy" DROP COLUMN "xml";