https://mods.factorio.com/mod/starshiptorio

Don't ask me why someone had your mod installed with mine, vehicles are rather pointless for starshiptorio.
But the changes you make to the collision masks are preventing new saves from being started.

After a bit of investigation into why your mod is breaking things, well...
Not only are you consuming one of the precious few additional collision mask layers that we have access to, you're consuming it without a good or valid reason.

You can achieve exactly what you're doing right now by using water-tile instead of wasting a collision mask layer.
Please see here for proof.

https://pastebin.com/e6aSQ9ZT [link valid for 2 weeks].

Please & thankyou.

You suggestions have been added. Thank you very much for your help and input!

Do to an issue with other collisions I have reverted the change for now and will look more into it after holidays.

sry but your solution won't work.
using "water-tile" is particulary a big issue with belts afaik

We're now only using "layer-14" and it is required in order to enable hovering over water. Sorry if this conflicts with your mod, but as you say they shouldn't be using it anyways. Maybe one day they can add more layers for mods to use.