Got an error message in KSP modded

[K1Tv]

Exception occured while saving ScenarioModule 'ContractVesselTracker':
System.NullReferenceException: Object reference not set to an instance of an object
at ContractConfigurator.Extensions+<>c__DisplayClass5_1.b__1 (ProtoPartSnapshot childPart) [0x00000] in <50aaafcd0dae43489715b7c388f819df>:0
at System.Linq.Enumerable+WhereListIterator1[TSource].MoveNext () [0x00037] in <351e49e2a5bf4fd6beabb458ce2255f3>:0 at System.Linq.Enumerable.TryGetFirst[TSource] (System.Collections.Generic.IEnumerable1[T] source, System.Boolean& found) [0x00045] in <351e49e2a5bf4fd6beabb458ce2255f3>:0
at System.Linq.Enumerable.FirstOrDefault[TSource] (System.Collections.Generic.IEnumerable1[T] source) [0x00000] in <351e49e2a5bf4fd6beabb458ce2255f3>:0 at ContractConfigurator.Extensions+<GetHashes>d__5.MoveNext () [0x00320] in <50aaafcd0dae43489715b7c388f819df>:0 at System.Linq.Enumerable.Any[TSource] (System.Collections.Generic.IEnumerable1[T] source) [0x00015] in <351e49e2a5bf4fd6beabb458ce2255f3>:0
at ContractConfigurator.ContractVesselTracker.OnSave (ConfigNode node) [0x0007c] in <50aaafcd0dae43489715b7c388f819df>:0

My Gamedata :
[x] Science! Continued (xScienceContinued 6.0.2.1)
Alcubierre Warp Drive (Stand-alone) (AlcubierreStandalone v112.0.1)
AmpYear (AmpYearPowerManager 1:V1.5.9.0)
Antenna Helper (AntennaHelper 2:1.0.7.8)
ASET Consolidated Agency (ASETAgency v2.0.2)
ASET Consolidated Avionics Pack (ASETAvionics v3.0.1)
ASET Consolidated Props Pack (ASETProps v2.0.7)
Astrogator (Astrogator v1.0.2)
Astronomer's Visual Pack (AstronomersVisualPack 3:v4.13)
Astronomer's Visual Pack-8k Textures (AVP-8kTextures v1.13)
AtmosphereAutopilot (Fly-By-Wire) (AtmosphereAutopilot v1.6.1)
Avionics Systems (AvionicsSystems v1.3.7)
B9 Aerospace Procedural Wings - Fork (B9-PWings-Fork 3:0.46.0)
B9 Part Switch (B9PartSwitch v2.20.0)
Background Resources (BackgroundResources 1:v0.18.0.0)
Benjee10 sharedAssets (Benjee10-SharedAssets v0.2.2)
BetterBurnTime (BetterBurnTime 1.10)
BetterKerbol (BetterKerbol v1.1.0)
BetterTimeWarpContinued (BetterTimeWarpCont 2.3.13.1)
Chatterer (Chatterer 0.9.99)
Chatterer Extended (ChattererExtended 0.6.2)
Classic Stock Resources (ClassicStockResources v1.2.2)
ClickThrough Blocker (ClickThroughBlocker 1:2.1.10.22)
Community Category Kit (CommunityCategoryKit v112.0.1)
Community Delta-V Maps (CommunityDeltaVMaps 3:1.7.3)
Community Delta-V Maps - OPM (CommunityDeltaVMaps-OPM 1.8.1)
Community Parts Titles (CommunityPartsTitles 0.10.3)
Community Parts Titles Extras: Categories (CommunityPartsTitlesExtrasCategory 0.10.3)
Community Parts Titles Extras: CCK - No Duplicates (CommunityPartsTitlesExtrasNoCCKDup 0.10.3)
Community Resource Pack (CommunityResourcePack v112.0.2-bleeding-edge.1)
Community Tech Tree (CommunityTechTree 1:3.4.5)
Community Terrain Texture Pack (CommunityTerrainTexturePack 1:1.0.5)
Conformal Decals (ConformalDecals 0.2.14)
Connected Living Space (ConnectedLivingSpace v2.0.2.0)
Contract Configurator (ContractConfigurator v2.11.1.0)
Contract Pack: Bases and Stations Reborn (ContractConfigurator-KerbinSpaceStation 2:3.7.3.3)
Contract Parser (ContractParser 9.0)
Contracts Window + (ContractsWindowPlus 9.4)
Cryo Tanks (CryoTanks 1.6.6)
Cryo Tanks Core (CryoTanks-Core 1.6.6)
Cryogenic Engines (CryoEngines 1:2.0.7)
Custom Asteroids (CustomAsteroids v1.9.0)
Custom Asteroids (alternative OPM config) (CustomAsteroids-Pops-OPM-Reconfig v1.2.0)
Custom Asteroids (inner stock system data) (CustomAsteroids-Pops-Stock-Inner v1.9.0)
Custom Asteroids (Kuiper belt analog for OPM) (CustomAsteroids-Pops-OPM-Outer v1.2.0)
Custom Asteroids (stockalike config) (CustomAsteroids-Pops-Stock-Stockalike v1.9.0)
Custom Barn Kit (CustomBarnKit 1.1.22.0)
DE_IVAExtension (DE-IVAExtension v1.2.0)
DeepFreeze Continued... (DeepFreeze V0.31.0.0)
Deferred (Deferred 1.2.6.0)
Deployable Engines Plugin (DeployableEngines 1.3.1)
Distant Object Enhancement /L (DistantObject v2.2.0.2)
Distant Object Enhancement /L default config (DistantObject-default v2.2.0.2)
DMagic Orbital Science (DMagicOrbitalScience 1.4.3)
DMModuleScienceAnimateGeneric (DMagicScienceAnimate v0.23)
Dock Rotate (DockRotate v1.12.1.56)
Docking Cam (DockingCamKURS 1.3.8.7)
Docking Port Alignment Indicator (DockingPortAlignmentIndicator 6.10.0.0)
Docking Port Sound FX (DockingPortSoundFX v2.1.12)
Dynamic Battery Storage (DynamicBatteryStorage 2:2.3.6.0)
Easy Vessel Switch (EVS) (EasyVesselSwitch 2.3)
Engine Lighting Relit (EngineLightRelit 1.6.3.4)
Environmental Visual Enhancements Redux (EnvironmentalVisualEnhancements 3:1.11.7.2)
Extended information about scientific experiments in VAB (ScienceSituationInfo 1:1.3.5)
Extraplanetary Launchpads (ExtraPlanetaryLaunchpads 6.99.3.0)
Far Future Technologies (FarFutureTechnologies 1.4.2)
Ferram Aerospace Research Continued (FerramAerospaceResearchContinued 3:0.16.1.2)
Filter Extensions - Default Configuration (FilterExtensionsDefaultConfig 3.2.9)
Filter Extensions - Plugin (FilterExtensions 3.2.9)
Final Frontier (FinalFrontier 1.10.0-3485)
FreeIva (FreeIva 0.2.19.0)
Hab Tech Props (HabTechProps v0.2.0)
Hangar Extender (HangerExtenderExtended 3.6.0.2)
Harmony 2 (Harmony2 2.2.1.0)
Heat Control (HeatControl 0.6.2)
Hide Empty Tech Tree Nodes (HideEmptyTechNodes 1.3.2)
HUD Replacer (HUDReplacer 1.2.12-beta)
HullcamVDS Continued (HullcamVDSContinued 0.2.2.3)
Infernal RO-Robotics (InfernalRoboticsRealismOverhaul 2.3.1)
Kcalbeloh System (KcalbelohSystem v1.1.8)
Kcalbeloh System 8k Textures (KcalbelohSystem-Textures-8k v1.1.8)
Kerbal Actuators (KerbalActuators v1.9.0)
Kerbal Alarm Clock (KerbalAlarmClock v3.14.0.0)
Kerbal Atomics (KerbalAtomics 1:1.3.4)
Kerbal Atomics - Other Mod Support (KerbalAtomics-NTRModSupport 1.3.4)
Kerbal Attachment System (KAS 1.12)
Kerbal Engineer Redux (KerbalEngineerRedux 1.1.9.5)
Kerbal Foundries2 (KerbalFoundriesContinued 2.4.8.18)
Kerbal Inventory System (KIS 1.29)
Kerbal Joint Reinforcement Continued (KerbalJointReinforcementContinued v3.8.3.0)
Kerbal Planetary Base Systems (KerbalPlanetaryBaseSystems v1.6.16)
Kerbal Stats (KerbalStats 3.1.0)
KerBalloons Continued (KerBalloons 1:0.6.0.1)
Kopernicus Expansion Continued-er (KopernicusExpansionContinueder Beta9.1)
Kopernicus Planetary System Modifier (Kopernicus 2:release-1.12.1-220)
KSA IVA Upgrade (KSAIVAUpgrade v1.6.7)
KSP Community Fixes (KSPCommunityFixes 1.36.1)
KSP Wheel (KSPWheel 1:0.16.14.33)
KSPBurst (KSPBurst v1.5.5.1)
KSPRC city lights (KSPRC-CityLights 0.7_PreRelease_3)
KSPRC Textures (KSPRC-Textures 0.7_PreRelease_3)
Lazy Painter (LazyPainter v0.4.0)
MechJeb 2 (MechJeb2 2.14.3.0)
MechJeb and Engineer for all! (MechJebForAll 1.3.0.7)
Moar Filter Extension Configs (MoarFEConfigs 1.0.5.2)
ModularFlightIntegrator (ModularFlightIntegrator 1.2.10.0)
Module Manager (ModuleManager 4.2.3)
NavHud (NavHudRenewed 1.4.0.5)
Near Future Construction (NearFutureConstruction 1.3.3)
Near Future Electrical (NearFutureElectrical 2.0.1)
Near Future Electrical Core (NearFutureElectrical-Core 2.0.1)
Near Future Exploration (NearFutureExploration 1.1.3)
Near Future IVA Props (NearFutureProps 1:0.7.2)
Near Future Launch Vehicles (NearFutureLaunchVehicles 2.2.1)
Near Future Propulsion (NearFuturePropulsion 1.3.6)
Near Future Propulsion - Xenon Hall Effect Thrusters (NearFuturePropulsion-XenonHETs 1.3.6)
Near Future Solar (NearFutureSolar 1.3.3)
Near Future Solar Core (NearFutureSolar-Core 1.3.3)
Near Future Spacecraft (NearFutureSpacecraft 1.4.5)
Outer Planets Mod (OuterPlanetsMod 2:2.2.11)
Outer Planets Mod - Final Frontier Ribbon Pack (OPMFinalFrontierRibbons 1.2)
Outer Planets Mod - Parallax with Scatters (Parallax-OuterPlanetsMod v1.0.5)
Parallax (Parallax 2.0.8)
Parallax - Stock Planet Textures (Parallax-StockTextures 2.0.8)
Parallax - Stock Scatter Textures (Parallax-StockScatterTextures 2.0.8)
Patch Manager (PatchManager 0.0.17.6)
PlanetShine (PlanetShine 0.2.6.6)
PlanetShine - Default configuration (PlanetShine-Config-Default 0.2.6.6)
Planetside Exploration Technologies (PlanetsideExplorationTechnologies 1.0.2)
Procedural Parts (ProceduralParts v2.6.0.0)
Progress Parser (ProgressParser 11.0)
RasterPropMonitor (RasterPropMonitor 1:v1.0.2)
RasterPropMonitor Core (RasterPropMonitor-Core 1:v1.0.2)
Rational Resources (RationalResources 3.0.2)
Rational Resources Companion (RationalResourcesCompanion 3.0.2)
Rational Resources TAC LS (RationalResourcesTACLS 3.0.2)
RealChute for Stock (RealChuteForStock v1.4.9.5)
RealChute Parachute Systems (RealChute v1.4.9.5)
Reentry Particle Effect Renewed (ReentryParticleEffect 1.9.1.1)
REPOSoftTech-Agencies (REPOSoftTech-Agencies V1.5.9.0)
ReStock (ReStock 1.5.1)
Restock Waterfall Expansion (RestockWaterfallExpansion 3.1.1)
ReStock+ (ReStockPlus 1.5.1)
Reviva (Reviva 1.0.0)
SCANsat (SCANsat v20.4)
Scatterer (Scatterer 3:v0.0878)
Scatterer Default Config (Scatterer-config 3:v0.0878)
Scatterer Sunflare (Scatterer-sunflare 3:v0.0878)
ScienceAlert ReAlerted (ScienceAlert 1.9.20.4)
Shabby (Shabby 0.4.0)
Shaddy (Shaddy v2.5)
Ship Effects Continued (ShipEffectsContinued 1.0.11.2)
Ship Manifest (ShipManifest 6.0.8.0)
Singularity (Singularity 0.991)
Space Dust (SpaceDust 0.5.5)
SpaceTux Library (SpaceTuxLibrary 0.0.8.6)
Speed Unit Annex (SpeedUnitAnnex 1.6.1)
Stockalike Mining Extension (StockalikeMiningExtension 1.1.6)
Stockalike Station Parts Expansion Redux (StationPartsExpansionRedux 2.0.11)
Stockalike Station Parts Expansion Redux - Internal Spaces (StationPartsExpansionRedux-IVAs 2.0.11)
System Heat (SystemHeat 0.8.1)
System Heat - Nuclear Engine Configuration (SystemHeat-FissionEngines 0.8.1)
System Heat - Nuclear Reactor Configuration (SystemHeat-FissionReactors 0.8.1)
System Heat - Resource Converter Configuration (SystemHeat-Converters 0.8.1)
System Heat - Resource Harvester Configuration (SystemHeat-Harvesters 0.8.1)
TAC Life Support (TACLS) (TACLS 1:v0.18.0.0)
TextureReplacer (TextureReplacer v4.5.3)
Textures Unlimited (TexturesUnlimited 1.6.2.28)
Through The Eyes of a Kerbal (ThroughTheEyesOfaKerbal 2.0.4.4)
Toolbar (Toolbar 1:1.8.1.2)
Toolbar Controller (ToolbarController 1:0.1.9.11)
Trajectories (Trajectories v2.4.5.3)
Transfer Window Planner (TransferWindowPlanner v1.8.0.0)
TriggerAu Flags (TriggerAu-Flags v2.11.0.0)
TUFX (TUFX 1.1.0)
TweakScale Redistributable (TweakScale-Redist v2.4.8.6)
Universal Storage II Finalized (UniversalStorage2 4.0.1.3)
Vertex Mitchell-Netravali Filtered Heightmap (VertexMitchellNetravaliHeightMap 0.3)
VertexColorMapEmissive (VertexColorMapEmissive 1.0.0)
Vessel Viewer Continued (VesselView 2:0.8.9)
VesselView-UI-RasterPropMonitor (VesselView-UI-RasterPropMonitor 1:0.8.9)
VexarpIVA (VexarpIVA 0.6.1)
Waterfall - Restock (WaterfallRestock 0.2.3)
Waterfall Core (Waterfall 0.10.3)
WaypointManager (WaypointManager 2.8.4.2)
Wild Blue Tools (WildBlueTools v1.90.4)
WildBlueIndustries CRP Play Mode (WildBlue-PlayMode-CRP v1.90.4)
ZTheme (ZTheme v1.1.3)

Thx