diff --git a/includes/UnreadWikis.php b/includes/UnreadWikis.php
index 16b3e6146..dbe6ec395 100644
--- a/includes/UnreadWikis.php
+++ b/includes/UnreadWikis.php
@@ -117,17 +117,13 @@ class EchoUnreadWikis {
 		if ( $alertCount || $msgCount ) {
 			$values = [
 				'euw_alerts' => $alertCount,
-				'euw_alerts_ts' => $dbw->timestamp(
-					$alertTime
-						? $alertTime->getTimestamp( TS_MW )
-						: static::DEFAULT_TS
-				),
+				'euw_alerts_ts' => $alertTime
+					? $alertTime->getTimestamp( TS_MW )
+					: static::DEFAULT_TS,
 				'euw_messages' => $msgCount,
-				'euw_messages_ts' => $dbw->timestamp(
-					$msgTime
-						? $msgTime->getTimestamp( TS_MW )
-						: static::DEFAULT_TS
-				),
+				'euw_messages_ts' => $msgTime
+					? $msgTime->getTimestamp( TS_MW )
+					: static::DEFAULT_TS,
 			];
 
 			// when there is unread alert(s) and/or message(s), upsert the row
diff --git a/includes/mapper/NotificationMapper.php b/includes/mapper/NotificationMapper.php
index 37b4c6202..8496fda4f 100644
--- a/includes/mapper/NotificationMapper.php
+++ b/includes/mapper/NotificationMapper.php
@@ -25,8 +25,6 @@ class EchoNotificationMapper extends EchoAbstractMapper {
 			static function ( IDatabase $dbw, $fname ) use ( $row, $listeners ) {
 				$row['notification_timestamp'] =
 					$dbw->timestamp( $row['notification_timestamp'] );
-				$row['notification_read_timestamp'] =
-					$dbw->timestampOrNull( $row['notification_read_timestamp'] );
 				$dbw->insert( 'echo_notification', $row, $fname );
 				foreach ( $listeners as $listener ) {
 					$dbw->onTransactionCommitOrIdle( $listener, $fname );