From a268a1a6fe36451edf2a657593505e3f34f65bd8 Mon Sep 17 00:00:00 2001
From: Florian Schaal <florian@schaal-24.de>
Date: Thu, 23 Nov 2017 10:56:47 +0100
Subject: [PATCH] Prevent master from being a mirror (Fixs #4854)

---
 interface/web/admin/server_edit.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/interface/web/admin/server_edit.php b/interface/web/admin/server_edit.php
index c2e746d5c5..c400483780 100644
--- a/interface/web/admin/server_edit.php
+++ b/interface/web/admin/server_edit.php
@@ -55,8 +55,8 @@ class page_action extends tform_actions {
 		global $app, $conf;
 
 		// Getting Servers
-		$sql = "SELECT server_id,server_name FROM server WHERE server_id != ? ORDER BY server_name";
-		$mirror_servers = $app->db->queryAllRecords($sql, $this->id);
+		$sql = "SELECT server_id,server_name FROM server WHERE server_id != ? AND mirror_server_id != ? ORDER BY server_name";
+		$mirror_servers = $app->db->queryAllRecords($sql, $this->id, $this->id);
 		$mirror_server_select = '<option value="0">'.$app->tform->lng('- None -').'</option>';
 		if(is_array($mirror_servers)) {
 			foreach( $mirror_servers as $mirror_server) {
-- 
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