Editor Bug: What is "Classic Plateau"?

Hi, this is a minor bug in the editor but it is recurring so I figured I should log it in case.

About 10% of the time, when saving a tuning pack (with no modifications on any map), it will give the error below. It is referencing a map that I believe is not available. Perhaps you are aware of the bug. I can ignore the error usually and it goes away. It seems to be looking for Classic Plateau.

Thanks for reading.

Instance instanceRef local_distributions in file c:\program files (x86)\steam\steamapps\common\age of empires iv\cardinal\attrib\instances\map_gen\map_gen_terrain_type\player_starts\tt_player_start_classic_plateau_med.xml references an instance that doesn’t exist (00000000000000000000000000000000:map_gen\distribution\local_distributions\local_dist_classic_cliffside). Value changed to null.