Issue with "A service can only go on sale once per 31 days"

Issue with "A service can only go on sale once per 31 days"

I wanted to put a service on sale but I am getting the message
a service can only go on sale once per 31 days

I have checked my records and it seems that the last time it was on sale was way more than 40 days back
I have contacted support but they said this counter is never wrong

Anyone can suggest any solution? 
Is it like this--> only one service can go on sale per 31 days? Because one of my other services is already on sale.