1) You should know better than to stick labels on DVDs
2) You may be able to fully revive the disc - (Been there) - It is possible that the disc at the current state is unreadable in some areas and give CRC errors. I have had this happen to me long before I started using printable DVDs, at the time I was using labels Try to get that label off as much as you can without tearing it and doing a mess - In some cases I have been able to completly remove the label off my Maxell DVDs and then scraping out the remaining bits and pieces. If you can manage to do so, your disc will be readable again.
You can use ISOBuster or lower your reading speed to minimal and have it recover (will take time).
I think the label is the problem here.
I think companies who still sell those labels should be sued! Even worse, the companies who make those applicators and claim it won't cause harm or errors to your disc, those should be sued too!