I have disabled syslog pool member , but still the logs are sending to the same server. any idea?

For example, F5 LTM have pool with name syslog and a pool member with IP 10.1.1.1 for the port 514. But now i dont want to send the logs to 10.1.1.1 and I have disabled the pool member. But still logs are recieving on 10.1.1.1. What could be the reason?