SLES15 Default Iptable rule causing issue

Below rule in iptables is causing the slptool to fail in detecting the services of other hosts. REJECT all -- anywhere anywhere reject-with icmp-host-prohibited I deleted it by using below command iptables -D INPUT -j REJECT --reject-with icmp-host-prohibited and slp started to discover from other node with firewall enabled. however when i reload the firewalld or reboot it again went back to original rule (REJECT) how can i delete this rule permanently so that even after reoading firewalld daemon it does not go back to default. or is there anyother way