Not able to create a Firebase (Google)project after deleting the existing ones

Check below error, when trying to create a new project I want to use Firebase Analytics. I had a existing project. But after deleting it I am not able to create a new project. Getting error saying maximum limit reached, when i dont even have single running project.

How do I permanently delete Firebase project?

To permanently delete your project: At the bottom of the General settings page, click Delete project. Select each checkbox to acknowledge the effects of deleting your project. Click Delete project.

How do I add an existing project to Firebase?

Log in to the Firebase console, then click Add project. Select your existing Google Cloud project from the dropdown menu, then click Continue. (Optional) Enable Google Analytics for your project, then follow the prompts to select or create a Google Analytics account. Click Add Firebase.

How long does it take to delete Firebase project?

TL;DR: It could take up to 30 days for a project to be completely deleted and only after complete deletion will you be able to re-use the SHA-1.

Max 8 Project created in free plan

Deleted Project available after 1 week