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-rw-r--r--settings/js/users.js3
1 files changed, 3 insertions, 0 deletions
diff --git a/settings/js/users.js b/settings/js/users.js
index 46ab12b857a..c9b1d855db0 100644
--- a/settings/js/users.js
+++ b/settings/js/users.js
@@ -127,6 +127,9 @@ $(document).ready(function(){
$('#newuser').submit(function(event){
event.preventDefault();
var username=$('#newusername').val();
+ if($('#content table tbody tr').filterAttr('data-uid',username).length>0){
+ return;
+ }
if($.trim(username) == '') {
alert('Please provide a username!');
return false;