https://mods.factorio.com/mod/beacon-overhaul
It introduces the overloading mechanic from space exploration, but the higher tier beacons in the current seablock pack provide only downsides.
The amount of module slots, efficiency and power balance is rebalanced based on detecting the beacon (if data.raw.beacon["beacon-2"]), but this kinda doesn't mesh with the beacon mod.
Could you either add a toggle for the beacon changes or check if the mod exists and not perform the edits? The latter can be done by just adding and not mods["beacon-overhaul"].
https://forums.factorio.com/viewtopic.php?p=584981#p584981