Transport Tycoon Forums

I'm trying to upload an update to my NewGRF using https://bananas.openttd.org/manager, but after filling out all form and submitting it, I get the error:

There is already an entry with the same md5sum-partial for this package; this most likely means you are uploading the exact same content.

Obviously the content is very similar to the one I've uploaded before since it's a new version of the same NewGRF, but it's not the exact same content since I've changed the graphics a bit.

How do I fix this error?

if it's the same md5sum, it IS the exact same. (*)


(*) there's a known attack where you can reproduce an md5sum with a specially crafted data tail, but we're not after cryptographic security here

The md5sum for NewGRFs is only done over the data part and not the sprite part. This should not be a problem as it's prudent to update the version entry in the Action 14 so the game knows which version to load.