zxbackup keeps notifying "abnormal interruption", but there is no operation active

My zextra notifications are filling up with:

Today, 9:27 PM - Error: Critical notification from ZxBackup: operation interrupted abnormally.

ZeXtras Suite has detected an abnormal interruption of a ZxBackup operation, usually caused by a mailboxd service restart.
Please make sure to find and fix the cause of said service restart before restarting the operation.

For additional information see http://wiki.zextras.com/wiki/Running_Operation_Awareness .

-- Operation Details --
Name: Smart Scan
Start Time: 13/05/2014 21:27:08
Operation Id: ab575f46-9e57-4714-8f52-949467dad4b3
Requested By: zimbra

-- Parameters --
origin = Initialization
dataPath = /opt/zimbra/backup/zextras/
OpStartTime = 1400041628142

but checking, there's NO operation pending.

zxsuite backup getAllOperations

        operationList                           

and, unfortunately, the link referenced above, Running Operation Awareness - ZeXtras Suite Wiki is unhelpful:

Running Operation Awareness/en
Running Operation Awareness/en

There is currently no text in this page. You can search for this page title in other pages, or search the related logs, but you do not have permission to create this page.

How do we (1) clear these reports, and (2) prevent them from reappearing -- when there's no operation actually pending?

Today, 9:27 PM - Error: Critical notification from ZxBackup: operation interrupted abnormally.

ZeXtras Suite has detected an abnormal interruption of a ZxBackup operation, usually caused by a mailboxd service restart.
Please make sure to find and fix the cause of said service restart before restarting the operation.

For additional information see  http://wiki.zextras.com/wiki/Running_Operation_Awareness  .


-- Operation Details --
Name: Smart Scan
Start Time: 13/05/2014 21:27:08
Operation Id: ab575f46-9e57-4714-8f52-949467dad4b3
Requested By: zimbra

-- Parameters --
origin = Initialization
dataPath = /opt/zimbra/backup/zextras/
OpStartTime = 1400041628142

but checking, there's NO operation pending.

zxsuite backup getAllOperations

operationList

and, unfortunately, the link referenced above, Running Operation Awareness - ZeXtras Suite Wiki is unhelpful:

Running Operation Awareness/en
Running Operation Awareness/en

There is currently no text in this page. You can search for this page title in other pages, or search the related logs, but you do not have permission to create this page.

How do we (1) clear these reports, and (2) prevent them from reappearing -- when there's no operation actually pending?

zxsuite backup getAllOperations

operationList

and, unfortunately, the link referenced above, Running Operation Awareness - ZeXtras Suite Wiki is unhelpful:

Running Operation Awareness/en
Running Operation Awareness/en

There is currently no text in this page. You can search for this page title in other pages, or search the related logs, but you do not have permission to create this page.

How do we (1) clear these reports, and (2) prevent them from reappearing -- when there's no operation actually pending?