Server Lag, timing Minecraft::Bukkit Scheduler SELF

Hello,
I have tps problem on my server.
Timing result only show that Minecraft::Bukkit Scheduler SELF is high.
Can someone tel me if its normal or what doing next to reduce that.
Ty.

https://timings.aikar.co/?id=aa3df85e18b84d2faf6c54add971e391#timings

Could you login on the server and send a timings report with active players? I dont think its causing any lag at all but i cannot see the tps.

Also would recommend removing the plugin laggremover.

https://timings.aikar.co/?id=61bc4485ae1c4508a97052608c27fb59

Without plugin laggremover and active player

Without itemjoin plugin

https://timings.aikar.co/?id=dba1e2b013dd4fe4954464121295ee9f

Looks fine to me, you can optimize all the yml files to ensure it works even faster but doesnt look like a problem.

Ok ty