--- /usr/share/zabbix/include/classes/api/services/CEvent.php.bak	2020-04-22 09:38:21.697304436 +0900
+++ /usr/share/zabbix/include/classes/api/services/CEvent.php	2020-04-22 09:51:20.654288996 +0900
@@ -471,6 +471,10 @@
 			$sqlParts['limit'] = $options['limit'];
 		}
 
+		if (array_key_exists('distinct', $options)) {
+			$sqlParts['distinct'] = $options['distinct'];
+		}
+
 		$result = [];
 
 		$sqlParts = $this->applyQueryOutputOptions($this->tableName(), $this->tableAlias(), $options, $sqlParts);
--- /usr/share/zabbix/include/classes/screens/CScreenProblem.php.bak	2020-04-22 09:43:12.454298672 +0900
+++ /usr/share/zabbix/include/classes/screens/CScreenProblem.php	2020-04-22 09:51:24.452288920 +0900
@@ -302,6 +302,9 @@
 				unset($options['suppressed']);
 				$options['selectSuppressionData'] = ['maintenanceid', 'suppress_until'];
 			}
+			if (array_key_exists('distinct', $filter)) {
+				$options['distinct'] = $filter['distinct'];
+			}
 
 			$problems = ($filter['show'] == TRIGGERS_OPTION_ALL)
 				? self::getDataEvents($options)
--- /usr/share/zabbix/include/db.inc.php.bak	2020-04-22 09:45:46.907295611 +0900
+++ /usr/share/zabbix/include/db.inc.php	2020-04-22 09:50:50.176289600 +0900
@@ -667,6 +667,10 @@
 }
 
 function zbx_db_distinct($sql_parts) {
+	if (array_key_exists('distinct', $sql_parts)) {
+		return $sql_parts['distinct'] ? ' DISTINCT' : '';
+	}
+
 	$count = count($sql_parts['from']);
 	if (array_key_exists('left_join', $sql_parts)) {
 		$count += count($sql_parts['left_join']);
--- /usr/share/zabbix/include/events.inc.php.bak	2020-04-22 09:52:41.054287402 +0900
+++ /usr/share/zabbix/include/events.inc.php	2020-04-22 09:53:21.908286592 +0900
@@ -475,7 +475,8 @@
 			'value' => TRIGGER_VALUE_TRUE,
 			'sortfield' => ['eventid'],
 			'sortorder' => ZBX_SORT_DOWN,
-			'limit' => ZBX_WIDGET_ROWS
+			'limit' => ZBX_WIDGET_ROWS,
+			'distinct' => false
 		]);
 
 		CArrayHelper::sort($problems, [