Warning SQL71502 - Procedure has an unresolved reference to object

Nicholas' answer put me on the right track, but did not fix the issue for me because I had an existing database reference to "master" which was left over from a legacy development environment and SQL server installation.

Deleting this (broken) reference and then re-adding it following Nicholas' instructions worked for me. Note that the "Suppress errors caused by unresolved references..." box wasn't checked by default in VS2019; I had to check that manually.

You just have to set 71502 in the field Buid/Suppress Transact-SQL warning :

This can be resolved by adding a database reference to the master database.

1. Add Database Reference:

2. Select the master database and click OK:

3. Result: