Add id indices
+CREATE CONSTRAINT ON (n:City) ASSERT n.id IS UNIQUE;
+CREATE CONSTRAINT ON (n:Comment) ASSERT n.id IS UNIQUE;
+CREATE CONSTRAINT ON (n:Country) ASSERT n.id IS UNIQUE;
+CREATE CONSTRAINT ON (n:Forum) ASSERT n.id IS UNIQUE;
+CREATE CONSTRAINT ON (n:Message) ASSERT n.id IS UNIQUE;
+CREATE CONSTRAINT ON (n:Organisation) ASSERT n.id IS UNIQUE;
+CREATE CONSTRAINT ON (n:Person) ASSERT n.id IS UNIQUE;
+CREATE CONSTRAINT ON (n:Post) ASSERT n.id IS UNIQUE;
+CREATE CONSTRAINT ON (n:Tag) ASSERT n.id IS UNIQUE;
CREATE INDEX ON :Country(name);
CREATE INDEX ON :Message(creationDate);
CREATE INDEX ON :Person(firstName);
-CREATE INDEX ON :Person(id);
CREATE INDEX ON :Post(creationDate);
CREATE INDEX ON :Tag(name);
CREATE INDEX ON :TagClass(name);
