Thanks for reaching out with the extra details here, it really helped provide additional clarity.
It looks like the main issue here is that the account has been migrated to our new account of V2, and that you are trying access an old account. There should be in an email in the accounts admins inbox, titled ‘Reminder: Critical updates to your New Relic user model and governance’ which confirms the migration.
it shows auto migration email This issue occurs when users have the same email for multiple accounts.
The best workaround here is to follow Relic Solution: So you’ve created a new account and can’t seem to access your old account.
If the issue persists, please reach out and let me know.
I hope this was helpful, should you have any questions or updates please do reach out.
Also if this helped resolve the issue please consider selecting the Solution ( How to Use the Official Solution Checkbox )option below this post.