This is the message.

"Paul Gooden has invited you to join Omnicell International's CRM account.

Since you are already a part of omnicell's CRM account and you are the only active user in that account, you will not be able to accept the invitation. 

To accept this invitation you need to,

Delete omnicell's CRM account. You can refer this help document to know how.

Once you have deleted the omnicell's CRM account, click Join Omnicell International's CRM account. 

If you do not wish to accept this invitation, please click Reject."

As far as I am aware I only do have one account.

Even deleting and adding the user invite again does not help.