Flutter - No compatible iOS versions between Flutterfire and Geofire (pods) - firebase

Question

I'm trying to get all my dependencies updated for null safety and the following scenario when I run pod install:
Analyzing dependencies
cloud_firestore: Using Firebase SDK version '7.3.0' defined in 'firebase_core'
cloud_functions: Using Firebase SDK version '7.3.0' defined in 'firebase_core'
firebase_analytics: Using Firebase SDK version '7.3.0' defined in 'firebase_core'
firebase_auth: Using Firebase SDK version '7.3.0' defined in 'firebase_core'
firebase_core: Using Firebase SDK version '7.3.0' defined in 'firebase_core'
firebase_database: Using Firebase SDK version '7.3.0' defined in 'firebase_core'
firebase_messaging: Using Firebase SDK version '7.3.0' defined in 'firebase_core'
firebase_storage: Using Firebase SDK version '7.3.0' defined in 'firebase_core'
[!] CocoaPods could not find compatible versions for pod "Firebase/Database":
In Podfile:
firebase_database (from `.symlinks/plugins/firebase_database/ios`) was resolved to 6.1.2, which depends on
Firebase/Database (= 7.3.0)
flutter_geofire (from `.symlinks/plugins/flutter_geofire/ios`) was resolved to 0.0.1, which depends on
GeoFire (~> 4.2) was resolved to 4.2.0, which depends on
GeoFire/Database (= 4.2.0) was resolved to 4.2.0, which depends on
Firebase/Database (~> 7.8.0)
Checking the native ios geofire and flutterfire library, I realize that the current version from geofire for iOS aims firebase database ~> 7.8 and the previously one database ~> 6.x.x.
Flutterfire null safety aims firebase 7.3.
Turning actually impossible to find a version with null-safety compatible between flutterfire and geofire.
I have tried before completely remove my pods with the commands without success:
cd ios
rm -rf Pods
rm -rf Podfile.lock
rm -rf ~/.pub-cache/hosted/pub.dartlang.org/
pod cache clean --all
pod deintegrate
flutter clean
flutter pub get
pod repo update
pod install
Any suggestions? thank you!