diff --git a/admin/inc/class.admin_customfields.inc.php b/admin/inc/class.admin_customfields.inc.php
index daba24c140..150bc3a8d8 100644
--- a/admin/inc/class.admin_customfields.inc.php
+++ b/admin/inc/class.admin_customfields.inc.php
@@ -459,7 +459,6 @@ class admin_customfields
 		$readonlys = array();
 
 		//echo 'customfields=<pre style="text-align: left;">'; print_r($this->fields); echo "</pre>\n";
-		$content['cf_order'] = (count($this->fields)+1) * 10;
 		$content['use_private'] = $this->use_private;
 		$content['use_readonly'] = $this->use_readonly;
 
@@ -471,18 +470,32 @@ class admin_customfields
 			{
 				$content['cf_private'] = explode(',',$content['cf_private']);
 			}
-			if($content['cf_name'])
+			if($content['cf_readonly'])
 			{
-				$readonlys['cf_name'] = true;
-			}
-			if ($content['cf_type'] === 'serial')
-			{
-				$readonlys['cf_values'] = true; // only allow to set start-value, but not change it after
+				$content['cf_readonly'] = explode(',',$content['cf_readonly']);
 			}
 			if (!isset($GLOBALS['egw_info']['apps'][$content['cf_type']]) || $content['cf_type'] === 'filemanager')
 			{
 				$content['cf_values'] = json_decode($content['cf_values'], true);
 			}
+			if ($_GET['action'] ?? null === 'copy')
+			{
+				unset($content['cf_id'], $cf_id);
+				$content['cf_name'] = lang('Copy of').' '.$content['cf_name'];
+				$content['cf_order'] += 5;  // behind copied field
+				$readonlys['button[delete]'] = true;
+			}
+			else
+			{
+				if($content['cf_name'])
+				{
+					$readonlys['cf_name'] = true;
+				}
+				if ($content['cf_type'] === 'serial')
+				{
+					$readonlys['cf_values'] = true; // only allow to set start-value, but not change it after
+				}
+			}
 		}
 		else
 		{
@@ -572,6 +585,13 @@ class admin_customfields
 				'group' => $group=1,
 				'disableClass' => 'th',
 			),
+			'copy' => array(
+				'caption' => 'Copy',
+				'allowOnMultiple' => false,
+				'url' => 'menuaction='.$edit.'&cf_id=$id&use_private='.$this->use_private.'&action=copy',
+				'popup' => '500x380',
+				'group' => $group,
+			),
 			'add' => array(
 				'caption' => 'Add',
 				'url' => 'menuaction='.$edit.'&appname='.$this->appname.'&use_private='.$this->use_private,
diff --git a/admin/lang/egw_de.lang b/admin/lang/egw_de.lang
index 073550e4ae..0fdc4d2b0b 100644
--- a/admin/lang/egw_de.lang
+++ b/admin/lang/egw_de.lang
@@ -244,6 +244,7 @@ connection is not secure! everyone can read eg. your credentials.	admin	de	Die V
 continue	admin	de	Weiter
 cookie domain (default empty means use full domain name, for sitemgr eg. ".domain.com" allows to use the same cookie for egw.domain.com and www.domain.com)	admin	de	Cookie Domain<br>(Vorgabe 'leer' bedeutet den kompletten Domainnamen, für SiteMgr erlaubt z.B. ".domain.com" das gleiche Cookie für egw.domain.com und www.domain.com zu verwenden)
 cookie path (allows multiple egw sessions with different directories, has problemes with sitemgr!)	admin	de	Cookie Pfad (erlaubt mehrere EGw-Sitzungen mit unterschiedlichen Verzeichnissen, hat Probleme mit SiteMgr!)
+copy of	admin	de	Kopie von
 could not append message:	admin	de	Diese E-Mail lässt sich nicht anzeigen
 could not complete request. reason given: %s	admin	de	Konnte Anfrage nicht beenden. Grund: %s
 could not extract private key from given p12 file. either the p12 file is broken or password is wrong!	admin	de	Konnte den privaten Schlüssel nicht aus der angegeben p12-Datei extrahieren. Entweder ist die p12-Datei kaputt oder das Passwort ist falsch!
diff --git a/admin/lang/egw_en.lang b/admin/lang/egw_en.lang
index 095eebe111..1d8249194d 100644
--- a/admin/lang/egw_en.lang
+++ b/admin/lang/egw_en.lang
@@ -244,6 +244,7 @@ connection is not secure! everyone can read eg. your credentials.	admin	en	Conne
 continue	admin	en	Continue
 cookie domain (default empty means use full domain name, for sitemgr eg. ".domain.com" allows to use the same cookie for egw.domain.com and www.domain.com)	admin	en	Cookie domain. Default empty uses full domain name. E.g. in Site Manager ".domain.com" allows to use the same cookie for egw.domain.com and www.domain.com.
 cookie path (allows multiple egw sessions with different directories, has problemes with sitemgr!)	admin	en	Cookie path. Allows multiple EGroupware sessions with different directories.
+copy of	admin	en	Copy of
 could not append message:	admin	en	Could not append Message:
 could not complete request. reason given: %s	admin	en	Could not complete request. %s
 could not extract private key from given p12 file. either the p12 file is broken or password is wrong!	admin	en	Could not extract private key from given p12 file. Either the p12 file is broken or password is wrong!