diff --git a/schema/mysql-upgrades/2.12.0.sql b/schema/mysql-upgrades/2.12.0.sql
index cb377df82..f2630ac34 100644
--- a/schema/mysql-upgrades/2.12.0.sql
+++ b/schema/mysql-upgrades/2.12.0.sql
@@ -1,13 +1,11 @@
 ALTER TABLE icingaweb_schema
   MODIFY COLUMN timestamp bigint unsigned NOT NULL,
   MODIFY COLUMN version varchar(64) NOT NULL,
-  ADD COLUMN IF NOT EXISTS success enum('n', 'y') DEFAULT NULL,
-  ADD COLUMN IF NOT EXISTS reason text DEFAULT NULL,
-  DROP CONSTRAINT IF EXISTS idx_icingaweb_schema_version,
+  ADD COLUMN success enum('n', 'y') DEFAULT NULL,
+  ADD COLUMN reason text DEFAULT NULL,
   ADD CONSTRAINT idx_icingaweb_schema_version UNIQUE (version);
 
 UPDATE icingaweb_schema SET timestamp = timestamp * 1000, success = 'y';
 
 INSERT INTO icingaweb_schema (version, timestamp, success, reason)
-  VALUES('2.12.0', UNIX_TIMESTAMP() * 1000, 'y', NULL)
-    ON DUPLICATE KEY UPDATE timestamp = VALUES(timestamp), success = VALUES(success), reason = VALUES(reason);
+  VALUES('2.12.0', UNIX_TIMESTAMP() * 1000, 'y', NULL);
diff --git a/schema/pgsql-upgrades/2.12.0.sql b/schema/pgsql-upgrades/2.12.0.sql
index 706a28c69..2a5818e5e 100644
--- a/schema/pgsql-upgrades/2.12.0.sql
+++ b/schema/pgsql-upgrades/2.12.0.sql
@@ -5,11 +5,9 @@ ALTER TABLE icingaweb_schema
   ALTER COLUMN version TYPE varchar(64),
   ADD COLUMN success boolenum DEFAULT NULL,
   ADD COLUMN reason text DEFAULT NULL,
-  DROP CONSTRAINT IF EXISTS idx_icingaweb_schema_version,
   ADD CONSTRAINT idx_icingaweb_schema_version UNIQUE (version);
 
 UPDATE icingaweb_schema SET timestamp = timestamp * 1000, success = 'y';
 
 INSERT INTO icingaweb_schema (version, timestamp, success, reason)
-  VALUES('2.12.0', EXTRACT(EPOCH FROM now()) * 1000, 'y', NULL)
-    ON CONFLICT ON CONSTRAINT idx_icingaweb_schema_version DO UPDATE SET timestamp = EXCLUDED.timestamp, success = EXCLUDED.success, reason = EXCLUDED.reason;
+  VALUES('2.12.0', EXTRACT(EPOCH FROM now()) * 1000, 'y', NULL);