Using SSDT, how do I resolve SQL71561 errors when I have a view that references objects in a different database?

Question

I have a database project in SSDT and when I import a view that references objects in a different database, I get error SQL71561, with a description along these lines:

Answer 1

These errors started appearing for me when I changed the Project Properties > Target Platform from SQL Server 2016 to SQL Server 2014.

In my scenario I have a database that is created by an external tool in one SSDT project (A) and my SQL views, etc in another project (B) with a reference from B->A.

Having developed against SQL 2016 I found our test environment was running 2014 so changed the target platform in (B) so I could deploy. (A) isn't deployed - the external tool is also installed and configured to produce the same database.

Strangely, I was later able to alter views in (B) and publish, but then wanted to remove a column. At this point the publish kept failing due to these reference errors. Changing the Target Platform on project (A) to 2014 then cleared the error and allowed me to proceed.