Refuting an alive message

Hello,

I decided to rename the hostname of each nodes of my consul cluster.
So I changed the hostname in the system first, then I changed the hostname in the consul configuration.
The consul cluster is working fine but each time I restart consul, I have this error message:

2020/01/14 11:14:41 [WARN] memberlist: Refuting an alive message for 'consul-app-dc1-01' (10.20.3.87:8301) meta:([255 141 164 114 111 108 101 166 99 111 110 115 117 108 163 118 115 110 161 50 165 98 117105 108 100 174 49 46 54 46 50 58 49 50 48 48 102 50 53 101 164 112 111 114 116 164 56 51 48 48 173 ....

What does it mean ?
Thanks.