Server can't keep up

[sargelfc]

Hey guys, new here!

 

Got an issue with my server, was running fine for a week or so, then started getting this error... 

Quote

[14:39:08] [Server thread/WARN] [net.minecraft.server.MinecraftServer]: Can't keep up! Did the system time change, or is the server overloaded? Running 8352ms behind, skipping 167 tick(s)

The ticks and ms behind vary but other than that it has started coming up more often, my CPU is only running at about 50% and the server only uses about 50% of allocated RAM at all times. will attach logs too, and as you can see, I literally had done nothing on the server at this point. occasionally the error will occur and the server will become laggy, although the CPU usage or RAM usage does not change, it is also running from an SSD so I am very confused! Any help would be appreciated.

latest.log