I'm getting the following error message for MRR. Is there anything I can do about it?

One or more workers on this rig has been assigned a share/worker difficulty by your pool that is too low. Hashrate performance issues may occur.
The OPTIMAL Difficulty range for this rig is 18,626 - 112k
Please either adjust your worker settings at your pool, or change pools if you are unable to do this at your current pool. Thanks!