The media has been labeled (I presume by Veritas default) e.g. 4MM000001
What you are seeing is the internal label of the tape, i.e. the label that is physically wrtitten on the tape. I guess you did not label the tape before you used it for the first time. What you should do is to label it so that the internal label matches that on your external label. For example, if your external label is TAPE01, you can label the tape so that is is TAPE01, instead of 4MM00001. This way you can easily identify your tape.
To label your tape, do the following: After you put the tape into the tape drive,go to the Media tab, right-click on the tape drive and select label. You would be prompted to enter the tape label. Just beware that when you label the tape, its contents are erased.
In future, you should label your tape using the above procedure before using it.