Problem with ip_conntrack

hi
few days ago when i checked logs it was showing following message :

ip_conntrack: table full, dropping packet.

okey so i increased ip_conntrack limit in /proc/sys/net/ipv4/ip_conntrack_max and problem resolved !

but i have a problem , everyday i dont know why it changing to old value ! and i should change it manualy everyday !

why ?

 

 

 

 

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