We have checked & found that there is no problem with ipconntrack limit, its still available to create new sessions.
root@*** [~]# sysctl net.ipv4.netfilter.ip_conntrack_max (assigned limit)
net.ipv4.netfilter.ip_conntrack_max = 65536
root@*** [~]# wc -l /proc/net/ip_conntrack (used)
31193 /proc/net/ip_conntrack