You have:

LTN Combinator for 0.18, 1.0 & 1.1 < Required dependency
? LTN Combinator Modernized (optional) < Optional dependency that explicitly marks the above as incompatible

The provide the same functionality. In fact "Modernized" was a fork from the same original that the "0.18 ..." was. With the exception of Modernized has been developed while the other has not. Yes, "Modernized" is mine, so this is a bit self serving. However, no one will ever be able to install it the way you have the dependencies set up. Both mods cannot be installed in the same game.

I didn't take a close look at those mods until now. After some consideration, the latest version of this modpack now has LTN Combinator Modernized as required and LTN Combinator for .18... is removed as it can be considered "depreciated" and a "duplicate".