This message is the result of a fix in the BMP_301 patch to overcome the RHEL OS bug
https://sourceware.org/bugzilla/show_bug.cgi?id=9981, in the latest Linux kernel versions in a dual stack (pv4 and ipv6) environment.
This is a debug statement to know how many customers are really enabled IPv6 and are impacted by above RHEL bug.
The message is not harmful, and can be ignored.