diff --git a/htdocs/eventorganization/class/conferenceorbooth.class.php b/htdocs/eventorganization/class/conferenceorbooth.class.php
index 90462fdb762..334998c0504 100644
--- a/htdocs/eventorganization/class/conferenceorbooth.class.php
+++ b/htdocs/eventorganization/class/conferenceorbooth.class.php
@@ -412,44 +412,8 @@ class ConferenceOrBooth extends ActionComm
 			// End call triggers
 		}
 
-		if (!$error) {
-			$this->oldref = $this->ref;
-
-			// Rename directory if dir was a temporary ref
-			if (preg_match('/^[\(]?PROV/i', $this->ref)) {
-				// Now we rename also files into index
-				$sql = 'UPDATE '.MAIN_DB_PREFIX."ecm_files set filename = CONCAT('".$this->db->escape($this->newref)."', SUBSTR(filename, ".(strlen($this->ref) + 1).")), filepath = 'conferenceorbooth/".$this->db->escape($this->newref)."'";
-				$sql .= " WHERE filename LIKE '".$this->db->escape($this->ref)."%' AND filepath = 'conferenceorbooth/".$this->db->escape($this->ref)."' and entity = ".$conf->entity;
-				$resql = $this->db->query($sql);
-				if (!$resql) { $error++; $this->error = $this->db->lasterror(); }
-
-				// We rename directory ($this->ref = old ref, $num = new ref) in order not to lose the attachments
-				$oldref = dol_sanitizeFileName($this->ref);
-				$newref = dol_sanitizeFileName($num);
-				$dirsource = $conf->eventorganization->dir_output.'/conferenceorbooth/'.$oldref;
-				$dirdest = $conf->eventorganization->dir_output.'/conferenceorbooth/'.$newref;
-				if (!$error && file_exists($dirsource)) {
-					dol_syslog(get_class($this)."::validate() rename dir ".$dirsource." into ".$dirdest);
-
-					if (@rename($dirsource, $dirdest)) {
-						dol_syslog("Rename ok");
-						// Rename docs starting with $oldref with $newref
-						$listoffiles = dol_dir_list($conf->eventorganization->dir_output.'/conferenceorbooth/'.$newref, 'files', 1, '^'.preg_quote($oldref, '/'));
-						foreach ($listoffiles as $fileentry) {
-							$dirsource = $fileentry['name'];
-							$dirdest = preg_replace('/^'.preg_quote($oldref, '/').'/', $newref, $dirsource);
-							$dirsource = $fileentry['path'].'/'.$dirsource;
-							$dirdest = $fileentry['path'].'/'.$dirdest;
-							@rename($dirsource, $dirdest);
-						}
-					}
-				}
-			}
-		}
-
 		// Set new ref and current status
 		if (!$error) {
-			$this->ref = $num;
 			$this->status = self::STATUS_CONFIRMED;
 		}