Error: Annotation Loss caused by Multiple Availability Events

When trying to approve an email program Marketo is returning the error:

Validation Error approving (Alert - HCP A2016090602r0) Potential HCP Annotation Loss caused by Multiple Availability Events in Succession followed by Scavenging and Protection Services.(Alert - HCP A2016090602r0) Potential HCP Annotation Loss caused by Multiple Availability Events —

An error occurred when procesing the email Body!

Encountered ":325)

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I am not able to approve and send the email.  Suggestions.