Can I have my backup tape back?

I am new in using backup tapes. After using it for a couple of monthes now, I did something crazy. I tried to get rid of all the incremental backups on the tabe ( I got some false confidence). In the restore tab, I used the erase command (I thought it would be non abrasive as formatting) to erase all the media on one of my tabes, and when I tried to backup using this tabe, a message pop up telling me that there is no unused media on the tabe. I tried many times but no way. Can I have it back orshall I replace it ith a new one?
Any help?