Applying Gavin Hird's patch to correct PGSQL group notices. Thatk you,

Gavin

OpenSim/Data/PGSQL/Resources/os_groups_Store.migrations

@@ -198,4 +198,14 @@ CREATE TABLE os_groups_principals (
   constraint os_groupprincpk PRIMARY KEY  ("PrincipalID")
 );
 
-COMMIT;
+COMMIT;
+
+:VERSION 4
+
+BEGIN;
+
+ALTER TABLE IF EXISTS os_groups_notices  
+  ALTER COLUMN "AttachmentItemID" SET DEFAULT '00000000-0000-0000-0000-000000000000'
+;
+
+COMMIT;