diff --git a/core/trunk/structure.sql b/core/trunk/structure.sql
index 2ccfcc41a60713a4ec981ff0097b79ea6534b61f..c3758d1528fc08762e00b71eac6d0ca546bebe78 100644
--- a/core/trunk/structure.sql
+++ b/core/trunk/structure.sql
@@ -1415,12 +1415,12 @@ CREATE TABLE templates_association
   what character varying(255) NOT NULL,
   value_field character varying(255) NOT NULL,
   maarch_module character varying(255) NOT NULL DEFAULT 'apps'::character varying,
-  notification_id character varying(50) NOT NULL,
-  description character varying(255) NOT NULL,
-  diffusion_type character varying(50) NOT NULL,
-  diffusion_properties character varying(255) NOT NULL,
-  diffusion_content character varying(255) NOT NULL,
-  is_attached character varying(1) NOT NULL DEFAULT 'N'::character varying,
+  notification_id character varying(50),
+  description character varying(255),
+  diffusion_type character varying(50),
+  diffusion_properties character varying(255),
+  diffusion_content character varying(255),
+  is_attached character varying(1) DEFAULT 'N'::character varying,
   CONSTRAINT templates_association_pkey PRIMARY KEY (system_id)
 )
 WITH (