I did some import testing and my resources ID is 6750. For a cosmetic only purpose, I would prefer have the item #1 of my website to have the resource ID 1.
Is there a simple/safe way to reset the resource ID?
My official suggestion would be to not worry about it: the IDs are shared between different types of resources and you’ll likely have deletion and such things in the future, so just stick with the IDs you have now.
If you really want to change them, you’d want to delete all resources and then you could reset the autoincrement on the resource table in the database manually.
Of course, reinstalling from scratch would have the effect of resetting the IDs as well.