Mixin target "IntegratedServer" was not found

Hey, I'm not sure if this is important at all. I'm going through my server's latest.log to check for errors and found the following warning:

[mixin]: @Mixin target net.minecraft.server.integrated.IntegratedServer was not found mixins.vanillafix.crashes.json:MixinIntegratedServer

Is this something I should look into fixing? I couldn't find any information about it via googling, just people's logs.

I couldn't make a guess to why there is an issue without a log from your end.

My apologies. I was half expecting this to be a non-issue so I didn't try to upload the latest.log, my bad.

Here it is: https://paste.ee/p/ioo3J

And also here is my environmental information:

• Minecraft version: 1.12.2
• Forge version: forge-1.12.2-14.23.5.2838-universal
• Modpack version (links to current modlist): 1.7.2
• Mod versions: VanillaFix-1.0.10-99