Can I know whats the problem here? wrong source code?

[nFeyz]

[12:20:56.273] [dispatch] [monster-marker] handle: error running hook for S_SPAWN_NPC<11>
hook: (anonymous) in monster-marker
data: { gameId: 3518437209472033n,
target: 0n,
loc:
Vec3 { x: 116605.1484375, y: 69930.671875, z: 3869.8251953125 },
w: -1.05231082048955,
relation: 12,
templateId: 5011,
huntingZoneId: 4,
shapeId: 0,
walkSpeed: 100,
runSpeed: 160,
status: 0,
mode: 0,
remainingEnrageTime: -178773062,
hpLevel: 5,
questInfo: 0,
visible: true,
villager: false,
spawnType: 1,
replaceId: 0n,
spawnScript: 0,
replaceDespawnScript: 0,
aggressive: false,
owner: 0n,
occupiedByPartyId: 0n,
occupiedByPlayerId: 0n,
bomb: false,
bySpawnEvent: false,
bgTeam: 0,
activeCylinder: 1,
repairable: true,
flightInteractionType: 0,
unkn1: false,
seats: [],
parts: [],
npcName: '유안티 샤먼(고레벨)' }
error: [dispatch] write: failed to generate S_SPAWN_DROPITEM<6>:
Error: version 6 of message (name: "S_SPAWN_DROPITEM", code: 36948) is outdated and cannot be used anymore
at markthis (Z:\Games\TeraProxyCaali\mods\monster-marker-master\index.js:165:7)
at Object.callback (Z:\Games\TeraProxyCaali\mods\monster-marker-master\index.js:127:5)