diff --git a/install/upgrades/3.4.0.sh b/install/upgrades/3.4.0.sh
index 43932eed..0ebd2346 100755
--- a/install/upgrades/3.4.0.sh
+++ b/install/upgrades/3.4.0.sh
@@ -1,9 +1,10 @@
 #!/bin/bash
 
 # this script is for 3.1.2 or 3.2.2
-# we named it 3.4.0.sh since some of us had a 3.3.0~rc1.sh installed at some point in time
+# we named it 3.4.0.sh since some of us had a 3.3.0~a.sql installed at some point in time
 # which means the alternc_status table have this number in mind.
 # so we need to have a bigger one 
+. /etc/alternc/local.sh
 
 echo "Fix OpenDKIM key generation"
 /usr/lib/alternc/alternc_fix_opendkim.php
@@ -13,3 +14,29 @@ echo "Fix phpmyadmin special user"
 
 echo "Fix of dovecot quotas"
 /usr/lib/alternc/update_quota_mail.sh
+
+DIDSOMETHING=1
+while [ "$DIDSOMETHING" -gt 0 ]
+do
+    DIDSOMETHING=0
+    for name in $(mysql --defaults-file=/etc/alternc/my.cnf --skip-column-names -B -e "SELECT name FROM variable GROUP BY name HAVING COUNT(*)>1;")
+    do
+	mysql --defaults-file=/etc/alternc/my.cnf -e "DELETE FROM variable WHERE name='$name' LIMIT 1"
+	DIDSOMETHING=1
+    done
+done
+
+# NOW we rollback the 3.3.0~a.sql crappy upgrade some of us had ...
+for field in id strata strata_id type
+do
+    mysql --defaults-file=/etc/alternc/my.cnf -f -e "ALTER TABLE variable DROP $field;"
+done
+mysql --defaults-file=/etc/alternc/my.cnf -f -e "ALTER TABLE variable DROP PRIMARY KEY;"
+
+mysql --defaults-file=/etc/alternc/my.cnf -f -e "ALTER TABLE variable DROP KEY name_2"
+mysql --defaults-file=/etc/alternc/my.cnf -f -e "ALTER TABLE variable DROP KEY name"
+mysql --defaults-file=/etc/alternc/my.cnf -f -e "ALTER TABLE variable ADD PRIMARY KEY name (name)"
+
+# and we fix variable if needed : 
+mysql --defaults-file=/etc/alternc/my.cnf -f -e "UPDATE variable SET value='$FQDN' WHERE value='%%FQDN%%'"
+