Server console is constantly spewing out the following:
[Server] Server thread/[WARN] [minecraft/V99]: Unable to resolve BlockEntity for ItemStack: tetra:scroll_rolled

This started recently, (perhaps a day or two before making this post), and we believe someone might've placed down a scroll from the mod Tetra and now the server doesn't know what to do with it.
This report doesn't really affect the server thankfully, as it can boot and function without crashing, therefore I have no crash log to provide. However I can only imagine that whatever it does affect is something I am unaware of and could lead to worst case scenarios.

Not to mention the constant spam is really annoying when trying to read the console. It reports the same line each time roughly twice every second, and then stops for a random amount of time (less than 10 minutes), only to then happen again.
I will also be posting this issue in the Tetra mod github, as I had not seen any reports neither there nor here with this particular issue.
Edit: ATM8 version 1.0.2.5