diff --git a/htdocs/core/actions_addupdatedelete.inc.php b/htdocs/core/actions_addupdatedelete.inc.php
index f871ed73de8..44a0f159143 100644
--- a/htdocs/core/actions_addupdatedelete.inc.php
+++ b/htdocs/core/actions_addupdatedelete.inc.php
@@ -117,6 +117,7 @@ if ($action == 'add' && !empty($permissiontoadd)) {
 
 	if (!$error) {
 		$result = $object->create($user);
+		var_dump($object);exit;
 		if ($result > 0) {
 			// Creation OK
 			$urltogo = $backtopage ? str_replace('__ID__', $result, $backtopage) : $backurlforlist;
diff --git a/htdocs/eventorganization/class/conferenceorboothattendee.class.php b/htdocs/eventorganization/class/conferenceorboothattendee.class.php
index 572d6f13856..4d44bc13287 100644
--- a/htdocs/eventorganization/class/conferenceorboothattendee.class.php
+++ b/htdocs/eventorganization/class/conferenceorboothattendee.class.php
@@ -248,9 +248,9 @@ class ConferenceOrBoothAttendee extends CommonObject
 		}
 
 		$result = $this->createCommon($user, $notrigger);
-		if ($result>0) {
-			$result =$this->fetch($result);
-			if ($result>0) {
+		if ($result > 0) {
+			$result = $this->fetch($result);
+			if ($result > 0) {
 				$this->ref = $this->id;
 				$result = $this->update($user);
 			}
@@ -293,7 +293,7 @@ class ConferenceOrBoothAttendee extends CommonObject
 
 		// Clear fields
 		if (property_exists($object, 'ref')) {
-			$object->ref = empty($this->fields['ref']['default']) ? "Copy_Of_".$object->ref : $this->fields['ref']['default'];
+			$object->ref = empty($this->fields['ref']['default']) ? "(PROV)" : $this->fields['ref']['default'];
 		}
 		if (property_exists($object, 'label')) {
 			$object->label = empty($this->fields['label']['default']) ? $langs->trans("CopyOf")." ".$object->label : $this->fields['label']['default'];
@@ -327,6 +327,9 @@ class ConferenceOrBoothAttendee extends CommonObject
 			$error++;
 			$this->error = $object->error;
 			$this->errors = $object->errors;
+		} else {
+			$object->ref = $object->id;
+			$result = $object->update($user);
 		}
 
 		if (!$error) {
diff --git a/htdocs/install/mysql/migration/13.0.0-14.0.0.sql b/htdocs/install/mysql/migration/13.0.0-14.0.0.sql
index 63f20198658..ac9da2b1092 100644
--- a/htdocs/install/mysql/migration/13.0.0-14.0.0.sql
+++ b/htdocs/install/mysql/migration/13.0.0-14.0.0.sql
@@ -425,14 +425,21 @@ CREATE TABLE llx_eventorganization_conferenceorboothattendee(
 ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD COLUMN fk_project integer NOT NULL;
 ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD COLUMN fk_invoice integer NULL;
 
+ALTER TABLE llx_eventorganization_conferenceorboothattendee DROP CONSTRAINT fx_eventorganization_conferenceorboothattendee_fk_soc;
+ALTER TABLE llx_eventorganization_conferenceorboothattendee DROP CONSTRAINT fx_eventorganization_conferenceorboothattendee_fk_actioncomm;
+ALTER TABLE llx_eventorganization_conferenceorboothattendee DROP CONSTRAINT fx_eventorganization_conferenceorboothattendee_fk_project;
+
 ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD INDEX idx_eventorganization_conferenceorboothattendee_rowid (rowid);
 ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD INDEX idx_eventorganization_conferenceorboothattendee_ref (ref);
 ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD INDEX idx_eventorganization_conferenceorboothattendee_fk_soc (fk_soc);
 ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD INDEX idx_eventorganization_conferenceorboothattendee_fk_actioncomm (fk_actioncomm);
-ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD CONSTRAINT fx_eventorganization_conferenceorboothattendee_fk_actioncomm FOREIGN KEY (fk_actioncomm) REFERENCES llx_actioncomm(id);
 ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD INDEX idx_eventorganization_conferenceorboothattendee_email (email);
 ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD INDEX idx_eventorganization_conferenceorboothattendee_status (status);
-ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD UNIQUE INDEX uk_eventorganization_conferenceorboothattendee(fk_soc, fk_actioncomm, email);
+
+-- VMYSQL4.1 DROP INDEX uk_eventorganization_conferenceorboothattendee on llx_eventorganization_conferenceorboothattendee;
+-- VPGSQL8.2 DROP INDEX uk_eventorganization_conferenceorboothattendee;
+
+ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD UNIQUE INDEX uk_eventorganization_conferenceorboothattendee(fk_project, email, fk_actioncomm);
 
 create table llx_eventorganization_conferenceorboothattendee_extrafields
 (
diff --git a/htdocs/install/mysql/tables/llx_eventorganization_conferenceorboothattendee.key.sql b/htdocs/install/mysql/tables/llx_eventorganization_conferenceorboothattendee.key.sql
index 0633e3cc2a2..9e1bbcde191 100644
--- a/htdocs/install/mysql/tables/llx_eventorganization_conferenceorboothattendee.key.sql
+++ b/htdocs/install/mysql/tables/llx_eventorganization_conferenceorboothattendee.key.sql
@@ -18,15 +18,11 @@
 ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD INDEX idx_eventorganization_conferenceorboothattendee_rowid (rowid);
 ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD INDEX idx_eventorganization_conferenceorboothattendee_ref (ref);
 ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD INDEX idx_eventorganization_conferenceorboothattendee_fk_soc (fk_soc);
-ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD CONSTRAINT fx_eventorganization_conferenceorboothattendee_fk_soc FOREIGN KEY (fk_soc) REFERENCES llx_societe(rowid);
 ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD INDEX idx_eventorganization_conferenceorboothattendee_fk_actioncomm (fk_actioncomm);
-ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD CONSTRAINT fx_eventorganization_conferenceorboothattendee_fk_actioncomm FOREIGN KEY (fk_actioncomm) REFERENCES llx_actioncomm(id);
 ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD INDEX idx_eventorganization_conferenceorboothattendee_fk_project (fk_project);
-ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD CONSTRAINT fx_eventorganization_conferenceorboothattendee_fk_project FOREIGN KEY (fk_project) REFERENCES llx_projet(rowid);
 ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD INDEX idx_eventorganization_conferenceorboothattendee_email (email);
 ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD INDEX idx_eventorganization_conferenceorboothattendee_status (status);
 -- END MODULEBUILDER INDEXES
 
-ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD UNIQUE INDEX uk_eventorganization_conferenceorboothattendee(fk_soc, fk_project, fk_actioncomm, email);
-
+ALTER TABLE llx_eventorganization_conferenceorboothattendee ADD UNIQUE INDEX uk_eventorganization_conferenceorboothattendee(fk_project, email, fk_actioncomm);