Don't create trigger with duplicate name until after old table is deleted

Signed-off-by: Adam Warner <me@adamwarner.co.uk>

advanced/Scripts/database_migration/gravity/7_to_8.sql

@@ -21,15 +21,15 @@ CREATE TRIGGER tr_group_update AFTER UPDATE ON "group"
       UPDATE "group" SET date_modified = (cast(strftime('%s', 'now') as int)) WHERE id = NEW.id;
     END;
 
+INSERT OR IGNORE INTO "group" (id,enabled,name,description) SELECT id,enabled,name,description FROM "group__";
+
+DROP TABLE "group__";
+
 CREATE TRIGGER tr_group_zero AFTER DELETE ON "group"
     BEGIN
       INSERT OR IGNORE INTO "group" (id,enabled,name) VALUES (0,1,'Unassociated');
     END;
 
-INSERT OR IGNORE INTO "group" (id,enabled,name,description) SELECT id,enabled,name,description FROM "group__";
-
-DROP TABLE "group__";
-
 UPDATE info SET value = 8 WHERE property = 'version';
 
 COMMIT;