id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
21129	Warn about missing primary key for all known relations	skyper	team	"==== What steps will reproduce the problem?
1. Have a `site` or ~~`destination_sign`~~ (see #21285) relation with only `type=*` and `name=*`
1. Run validator


==== What is the expected result?
A warning about missing primary key

==== What happens instead?
No warning

==== Please provide any additional information below. Attach a screenshot if possible.
This came up in #20902.
Some relation types already have intensive validations but some like the two above (and likely a few more) miss a test for the primary key, so far.

{{{
Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2021-07-16 23:15:08 +0200 (Fri, 16 Jul 2021)
Revision:18045
Build-Date:2021-07-17 01:31:02
URL:https://josm.openstreetmap.de/svn/trunk
}}}"	enhancement	new	normal		Core validator			template_report relation primary key