Issue with Baked Light-- Wrong Shadows and Black Spots on objects

hello, I am having a problem as a newbie to unity. I am getting errors like below where I reproduce the lighting. False shadows appear on the walls and floor. This is how my settings are. I am waiting for your help.
In the below I shared problems, setting for lighting and wall&floor light setting





This guide might help you troubleshoot the issue Lightmapping Troubleshooting Guide