Cause

You have run a project comparison, checking the layers of the test project (incoming project) against those of the comparison project and differences were found.

This message is output when the property placement of a symbol placed in the schematic has a different layer setting to that defined for the same symbol in the symbol library. <x> stands for the name of the symbol, <y> for the name of the property placement, <z> for the layer of the property placement in the symbol library and <u> for the layer of the property placement of the symbol in the schematic.

Solution

Change the layer of the property placement for the symbol located in the schematic and synchronize the layer of the property placement in the symbol library.

Then start a project comparison or new check run.