Hi everyone, I got a problem with my miner.

My miner has been working for past 6 months, recently a message keeps popping up 

buf: {"id":4,"jsonrpc":"2.0","error":{"code":-1,"message":"Low difficulty share"}}

I changed the miner version form 10.2 to 11.3

Same code but won't work. Can anyone help me with it? Please~