This message was added in version 2.6. It’s a new reminder that appears before GoTo to check whether the device is level within 1°. It's mainly intended to help users who haven't performed or completed polar alignment correctly.
Even if you've already done the alignment, we suggest checking the horizontal error value when this message appears. If your latitude is below 90°, please compare the value with your actual local latitude, or go to the EQ polar alignment screen and check the difference between the azimuth and altitude values—large discrepancies may indicate that the alignment needs adjustment.