Im getting this error on server start

hi, mny server has been running pretty smoothly but today it was a bit different since without making any changes i just got this error after rebooting my pc and starting the server

[17:19:54 ERROR]: Failed to start the minecraft server
net.minecraft.util.DirectoryLock$LockException: /home/coded/Documents/uwu_servers/RP_server/./FaladorRP/session.lock: already locked (possibly by other Minecraft instance?)
    at net.minecraft.util.DirectoryLock$LockException.alreadyLocked(DirectoryLock.java:100) ~[paper-1.21.4.jar:1.21.4-222-9b1798d]
    at net.minecraft.util.DirectoryLock.create(DirectoryLock.java:30) ~[paper-1.21.4.jar:1.21.4-222-9b1798d]
    at net.minecraft.world.level.storage.LevelStorageSource$LevelStorageAccess.<init>(LevelStorageSource.java:435) ~[paper-1.21.4.jar:1.21.4-222-9b1798d]
    at net.minecraft.world.level.storage.LevelStorageSource.validateAndCreateAccess(LevelStorageSource.java:350) ~[paper-1.21.4.jar:1.21.4-222-9b1798d]
    at net.minecraft.server.Main.main(Main.java:184) ~[paper-1.21.4.jar:1.21.4-222-9b1798d]
    at io.papermc.paper.PaperBootstrap.boot(PaperBootstrap.java:21) ~[paper-1.21.4.jar:1.21.4-222-9b1798d]
    at org.bukkit.craftbukkit.Main.main(Main.java:281) ~[paper-1.21.4.jar:1.21.4-222-9b1798d]
    at io.papermc.paperclip.Paperclip.lambda$main$0(Paperclip.java:42) ~[app:?]
    at java.base/java.lang.Thread.run(Thread.java:1447) ~[?:?]

i can give more info if needed