Is it possible to make variants of props by inheriting from a base prop?

I’m trying to make a tile-based game in UEFN, and so far I’m having troubles with creating static tile props.

In this game, there are tiles of different colors. So I thought I would create a prop blueprint that would define most things (static mesh, dimensions, destructibility, etc.) and then inherit a new blueprint from this base blueprint and assign material (which would define color).

In the editor, it looks like this:

All good so far, except I can’t launch a session to try it. Project fails to be validated with a vague error.

Found disallowed object /MyGame/Props/Prop_Tile_Base.Prop_Tile_Base_C
Referenced By /MyGame/Props/Prop_Tile_Blue
Referenced By /MyGame/Props/Prop_Tile_Red

I have tried googling this error, but nothing comes up. Any ideas about what this error could mean and how to get past it?