I noticed that other threads for compat requests with AAI Industry exists, but I decided to take a crack at fixing it, and with a few extra lines in the add_prerequisites() function this is solved, and it at least runs successfully. It could still be unwinnable, but I think this is at least a non-committal way to allow others to tackle that part if they desire.

--- Adds prerequisites to a technology's list of prerequisites.
---@param name string
---@param prerequisites string[]
function utils.add_prerequisites(name, prerequisites)
    local technology = data.raw.technology[name]
    technology.prerequisites = technology.prerequisites or {}

-- NEW STARTS HERE
    local existing = {}
    for _, prerequisite in pairs(technology.prerequisites) do
        existing[prerequisite] = true
    end
    for _, prerequisite in pairs(prerequisites) do
        if not existing[prerequisite] then
            technology.prerequisites[#technology.prerequisites+1] = prerequisite
        end
    end
end

Simply registers existing prerequisites into a set, so that duplicates don't exist, since that was the only load error (specifically, it was "engine" being duplicated in the "chemical-science-pack" tech prerequisites).

Tested this with Fulgora, Vulcanus, Gleba, and Aquilo (with Dredgeworks: Frozen Reaches)

I just changed the function to do basically what you've suggested, just slightly differently, thanks for the suggestion. Added in 1.1.8

Awesome cheers! And yeah those are great improvements to the code, didn't love it testing against the map if prerequisites was previously nil