CRM 2011 Outlook client error - "The caller id does not match the subscription owner id. Only subscription owners may perform subscription operations."

Recently I came accross this error when trying to open CRM options in outlook ( In Outlook Navigate to File --> CRM --> option)

One possible cause is, registry keys might have a different UserId, to resolve this, Go to Registry and check whether

HKEY_CURRENT_USER\Software\Microsoft\MSCRMClient\OutlookSyncSubscriptionId
and
HKEY_CURRENT_USER\Software\Microsoft\MSCRMClient\UserId

are similar, if not replace OutlookSyncSubscriptionId with UserId, then Restart Outlook.