The tag is present in Lintian version 2.104.234. That is the most recent version we know about.
The quilt series file contains non-standard options to apply some of the listed patches. Quilt uses '-p1' by default if nothing is specified after the name of the patch and the current series file specify something else for some of the patches listed.
For compatibility with the source "3.0 (quilt)" source package format, you should avoid using any option at all and make sure that your patches apply with "-p1". This can be done by refreshing all patches like this: quilt pop -a; while quilt push; do quilt refresh -pab; done