Hmm, in your model, it's written like this:
1
It's missing the surcoat and horsehair, so it's likely that one or two more materials are missing (don't worry, you can overwrite these again). It should look something like this:
1
Added 4 minutes ago
You can find the exact number of materials in the geometry. Let's look at my example; this is the geometry for the same knight from the Footman mod.
EB795106-0F65-40B9-966B-F815712388B8
Global
1.47361
3.23581
5.22057
-0.0472489
-0.317651
2.61028
-0.63961
-0.701903
5.13794
0
0
0
0
2
2 - 2 materials for the horse
2 - 2 materials for the knight
Horse_meshShape
Knight_meshShape