negative listeners

our icecast 2.3.2 stats. please see the listeners count...

admin icemaster@localhost
client_connections 1478218
clients 68
connections 1489278
file_connections 1585
host radio.hbr1.com
listener_connections 540097
listeners -30
location Earth
server_id Icecast 2.3.2
source_client_connections 0
source_relay_connections 11
source_total_connections 11
sources 6
stats 0
stats_connections 0


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