Unable to disable Application Management due to Lien in managed project

Hello,

I am trying to completely clean up an old Google Cloud environment associated with a personal Gmail account.

Currently:

  • Billing account is already closed
  • All user-created projects have been deleted

However, I still see:

  • A managed project (e.g. google-mpf-xxxx)
  • A folder related to “Proof of Concept”

When I try to disable “Application Management”, I get the following error:

“This project has one or more liens. To disable Application Management, these liens must be removed.”

Questions:

  1. Is it safe to leave this managed project and folder as-is?
  2. Is there any way to completely remove them?
  3. Are there any billing or security risks if I leave them?

Thank you.