diff -r a7e543ab0c5f -r e2aa673dd473 setup/postgres/psql_create_tables.sql
--- a/setup/postgres/psql_create_tables.sql	Thu Oct 22 12:00:34 2020 +0200
+++ b/setup/postgres/psql_create_tables.sql	Thu Oct 22 13:03:26 2020 +0200
@@ -12,6 +12,7 @@
 create table lpit_project (
     projectid       serial          primary key,
     name            varchar(20)     not null unique,
+    node            varchar(20)     not null unique,
     description     varchar(200),
     repoUrl         varchar(50),
     owner           integer         references lpit_user(userid)
@@ -29,21 +30,26 @@
     versionid       serial          primary key,
     project         integer         not null references lpit_project(projectid),
     name            varchar(20)     not null,
+    node            varchar(20)     not null,
     ordinal         integer         not null default 0,
     status          version_status  not null default 'Future'
 );
 
+create unique index lpit_version_node_unique on lpit_version(project, node);
 
 create table lpit_component (
     id              serial          primary key,
     project         integer         not null references lpit_project(projectid),
     name            varchar(20)     not null,
+    node            varchar(20)     not null,
     color           char(6)         not null default '000000',
     ordinal         integer         not null default 0,
     description     text,
     lead            integer         references lpit_user(userid)
 );
 
+create unique index lpit_component_node_unique on lpit_component(project, node);
+
 create type issue_status as enum (
     'InSpecification',
     'ToDo',