Removal of account admin

[IN]

Hi, 

I'm having issues with removing account admin (probably the first one, to which databricks account was related to). Under user management, when I hit the delete user button, it prompts:

Either missing permissions to delete <user_email> or deleting own account.

If I try to revoke roles permission (Account admin) it prompts:

PERMISSION_DENIED: Cannot remove roles for ID.

I have an account admin permissions on the databricks. 

[IN]

I have also tried removing account using databricks CLI: 

databricks account users delete <ID>

Error: Either missing permissions to delete <account> or deleting own account.