Here we explain what it means and what you need to do.
You've received the message because Socreg has encountered a mismatch between the security contact that claimed an IP address (individually or by subnet) and the security contact that registered a subdomain.
(Note: In Socreg the assignment of a subdomain enables the transfer of IP address responsibility to the right party, but does not assign security contact responsibility).
For example, if security contact A registers a subdomain xyz.berkeley.edu and another security contact B claims subnet a.b.c.0/24 and there is a set of hostnames defined...