diff --git a/CHANGELOG.md b/CHANGELOG.md
index ca4765d5..d85fa3d7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [UNRELEASED]
+
+### Fixed
+
+- Fix SQL errors with custom dropdown fields
+
 ## [1.23.3] - 2026-02-12
 
 ### Added
diff --git a/inc/container.class.php b/inc/container.class.php
index 4f9f3656..12f685e9 100644
--- a/inc/container.class.php
+++ b/inc/container.class.php
@@ -2217,8 +2217,10 @@ public static function getAddSearchOptions($itemtype, $containers_id = false)
                     $opt[$i]['datatype']   = 'specific';
                     $opt[$i]['searchtype'] = ['equals', 'notequals'];
                 } else {
-                    $opt[$i]['table']    = CommonDBTM::getTable($dropdown_matches['class']);
-                    $opt[$i]['field']    = 'name';
+                    $opt[$i]['table']    = getTableForItemType($dropdown_matches['class']);
+                    $opt[$i]['field']    = is_a($dropdown_matches['class'], CommonTreeDropdown::class, true)
+                        ? 'completename'
+                        : 'name';
                     $opt[$i]['right']    = 'all';
                     $opt[$i]['datatype'] = 'dropdown';