/mv version -p output

https://paste.gg/dadebfcafe0c4ebc94c5e44fb3c54655

Server logs

https://paste.gg/p/anonymous/3e6bd4371958456cbcb3fc13a504839e

Server Version

[18:24:00] [Thread-21/INFO]: This server is running Paper version git-Paper-68 (MC: 1.20.1) (Implementing API version 1.20.1-R0.1-SNAPSHOT) (Git: 5de0f8a)
You are running the latest version
Previous version: git-Paper-67 (MC: 1.20.1)

Bug Description

When I start my server, I get warned saying my server performance will be affected. Here is the full message:

[18:00:13] [Server thread/WARN]: [Multiverse-Core] "Multiverse-Core v4.3.1-b861" has registered a listener for org.bukkit.event.entity.EntityCreatePortalEvent on method "public void com.onarandombox.MultiverseCore.listeners.MVPortalListener.entityPortalCreate(org.bukkit.event.entity.EntityCreatePortalEvent)", but the event is Deprecated. "Server performance will be affected"; please notify the authors [dumptruckman, Rigby, fernferret, lithium3141, main--].

Steps to reproduce

When I start my server, it triggers the bug.

Agreements

• I have searched for and ensured there isn't already an open or resolved issue(s) regarding this.
• I was able to reproduce my issue on a freshly setup and up-to-date server with the latest version of Multiverse plugins with no other plugins and with no kinds of other server or client mods.

[x]  I have searched for and ensured there isn't already an open or resolved issue(s) regarding this.

I don't think you have. See #2000.
If you had read the entire thing, you would have seen:
[Multiverse-Core] We are aware of the warning about the deprecated event. There is no alternative that allows us to do what we need to do. The performance impact is negligible. just under it.
This is not really a problem as the plugin still works, and the performance impact is tiny. A fix will be released in MV5 though.