OKM: Multiple "Data Unit IDs" exist for the Same "External Tag"

Hi,

While viewing the "Data Unit ID" panel in the OKM and sorting by "External Tag", we noticed that we have several Data Unit IDs associated with the same external tag (which is our external tape label volser), and each Data Unit ID has the same Key ID.

Is there a reason why multiple data unit ids would be created for the same external tag (tape volser)?

Regards,

Sylvia  

For example:

External Tag: M02033

 

Data Unit ID:                                                              Key ID:                                              

 

A56495B434B168E5F17F12160C97D6B2                25339A5A51D650AAE30C1D7D1DAFD9BD631BE40C3F3706AE8D23FDCDA6A9