A column being referenced has not been found in the DB schema
The idea around these database related rules is that they can give early feed back as to any configuration differences between the database and the IIB/WMB code.
In this case the code analysis is checking that the columns referred to in the code exist in the database.
This will prevent runtime issues in the future when the code is executed.
Please also refer to R6 – A table being referenced has not been found in the DB schema (WMB) which includes how to setup the connection to the database.