RL020

Reference to an abandoned rule

Severity
Warning
Module
rule-lint
What it means
The body of a D, P or I rule, or an extends/related note on one, references an unqualified rule ID in state A. Text in backticks is ignored in bodies.
How to fix it
Point the reference at a rule still in force. In a body, wrap the ID in backticks if it is not a reference.