[firebase_database]Cann't run

[heinzan]

Running "flutter pub get" in example...
Because firebase_database_example depends on firebase_core from path which doesn't exist (could not find package firebase_core at "../../firebase_core/firebase_core"), version solving failed.
pub get failed (66; Because firebase_database_example depends on firebase_core from path which doesn't exist (could not find package firebase_core at "../../firebase_core/firebase_core"), version solving failed.)

firebase_core: 1.1.0
firebase_auth: ^1.1.3
firebase_database: ^6.0.0

Cann't run my project when I updated plugin.