diff --git a/htdocs/install/mysql/migration/19.0.0-20.0.0.sql b/htdocs/install/mysql/migration/19.0.0-20.0.0.sql
index c32c983f4b1..8b73838d634 100644
--- a/htdocs/install/mysql/migration/19.0.0-20.0.0.sql
+++ b/htdocs/install/mysql/migration/19.0.0-20.0.0.sql
@@ -308,3 +308,9 @@ ALTER TABLE llx_rights_def ADD COLUMN module_origin varchar(64) AFTER module;
 ALTER TABLE llx_rights_def ADD COLUMN enabled text NULL AFTER bydefault;
 
 DELETE FROM llx_c_action_trigger WHERE code = 'BILLREC_AUTOCREATEBILL';
+
+
+-- element_element, see https://github.com/Dolibarr/dolibarr/pull/29329
+
+ALTER TABLE element_element ADD COLUMN relationtype	varchar(64) DEFAULT NULL AFTER targettype;
+
diff --git a/htdocs/install/mysql/tables/llx_element_element.sql b/htdocs/install/mysql/tables/llx_element_element.sql
index 45798b6537c..190c8746180 100644
--- a/htdocs/install/mysql/tables/llx_element_element.sql
+++ b/htdocs/install/mysql/tables/llx_element_element.sql
@@ -26,6 +26,6 @@ create table llx_element_element
   fk_source			integer NOT NULL,
   sourcetype		varchar(64) NOT NULL,
   fk_target			integer NOT NULL,
-  targettype		varchar(64) NOT NULL
+  targettype		varchar(64) NOT NULL,
+  relationtype		varchar(64) DEFAULT NULL
 ) ENGINE=innodb;
-