345.464 Error ModManager.cpp:1625: Reached id limit for entity. The game can't contain more than 65535 instances of this prototype due to hardcoded limits of the engine. See the log file for more detail.
in combination with https://mods.factorio.com/mod/X-CustomGame it adds more than 70000 prototypes.

its not custom game
sorry

That's expected when you have many mods, you may decrease the max level to generate fewer entities, I'm planning to fix that completely but will take some time

I'm not sure at all if this is possible, but instead of creating unique buildings is there a way to reference the "Products Made" metric and base the bonuses against that?

We can't change values from buildings directly, that's why it's necessary to create a unique building.

I'm right now writing an alternative way of doing this using modules, it gives feedbacks properly about improvements and doesn't increase prototypes.

But from my experience it will take 2-3 days to implement