• DacFx Version 162.0.52:
• .NET Framework (Windows-only) or .NET Core: net7.0
• Environment (local platform and source/target platforms): Windows 11

Steps to Reproduce:

1. Create multiple Sql projects with database reference (same database)
2. Load the dacpac which references other dacpac with var dacpac = DacPackage.Load("MyPath\\MyDacpac.dacpac");
3. Call Unpack method on dacpac dacpac.Unpack($@"working\{dacpac.Name}.tmp");

It throws:

Microsoft.SqlServer.Dac.DacServicesException: 'Could not unpack the package.'

Inner exception:

KeyNotFoundException: The given key 'C:\Dev\Sources\MyPath\BASEINFRASTRUCTURE.DACPAC' was not present in the dictionary.