diff --git a/htdocs/install/mysql/tables/llx_element_resources.sql b/htdocs/install/mysql/tables/llx_element_resources.sql
index 4fac28de4b1..d619626d3d7 100644
--- a/htdocs/install/mysql/tables/llx_element_resources.sql
+++ b/htdocs/install/mysql/tables/llx_element_resources.sql
@@ -26,9 +26,6 @@ CREATE TABLE llx_element_resources
   resource_type	  varchar(64),		-- resource or user
   busy			  integer,
   mandatory		  integer,
-  dateo				date,						    -- date start of using ressource
-  datee				date,						    -- date end of using ressource
-  datet				date,						    -- date terminaison of using ressource
   duree				real,               -- total duration of using ressource
   fk_user_create  integer,
   tms             timestamp