Sorry if an answer to this question exists elsewhere, but I've been unable to find it. I have a series of reoccurring appointments scheduled in my calendar that I'd like to delete, yet any time I try to delete the series or the instance, I recieve this error:

msg - system failure: missing blob for id: 29578, change: 39159
com.zimbra.cs.service.ServiceException: system failure: missing blob for id: 29578, change: 39159
at com.zimbra.cs.service.ServiceException.FAILURE(Ser viceException.java:174)
at com.zimbra.cs.mailbox.MailItem.getBlob(MailItem.ja va:632)
at com.zimbra.cs.mailbox.MessageCache.fetchFromStore( MessageCache.java:213)
at com.zimbra.cs.mailbox.MessageCache.getItemContent( MessageCache.java:117)
at
<snip more stack trace>

code - service.FAILURE
method - ZmCsfeCommand.prototype.invoke
detail - soap:Receiver

Is there a way through the administrative console (or at all) that I can get rid of these things?