Unity3D: What could be affecting my baked lighting?


I have a scene in which I have placed multiple sources of light in an apartment. After baking my lights, one of the rooms have strange smudges on the wall just above my window

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Here are the settings for the light in that room

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I have meddled with different settings, including the lighting tab, lightmap parameters for that particular wall and even model settings in a desperate attempt to get rid of these. What could be causing this and how do I fix it?