So we basically store the scene guid of the scene the atlassingData was baked for, but then we don't store the scene guid in the actual hash. This means that if you bake 2 scenes that look the same, the second scene will try to use the first ones atlassing data since it would be the same, but then fails when it is trying to write the Lighting Data Asset since the scene GUIDs are different. A fix for now is to include the scene guid in the atlassing hash so that the scenes can't share this, but it would be good to not fetch the scene guid from the atlassing data.

This bug appears currently when trying to bake 2 exact scenes after each other and the second one will always fail on the Write Lighting Data Asset step.