We have removed the unconfined domain from our system based on RHEL6. 
After that when we run audit2allow we see the following messages

[root@vos-cm148 ~]# audit2allow -a 
libsepol.context_from_record: invalid security context: "sysadm_u:system_r:useradd_t:s0-s0:c0.c1023"
libsepol.context_from_record: could not create context structure
libsepol.context_from_string: could not create context structure
libsepol.sepol_context_to_sid: could not convert sysadm_u:system_r:useradd_t:s0-s0:c0.c1023 to sid

Are these harmful? What do they mean and how can we get rid of them. 

Thanks,
Anamitra