diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/Drivers/DriverHostActor.cs b/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/Drivers/DriverHostActor.cs
index b3339e42..27bc6a70 100644
--- a/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/Drivers/DriverHostActor.cs
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/Drivers/DriverHostActor.cs
@@ -644,8 +644,6 @@ public sealed class DriverHostActor : ReceiveActor, IWithTimers, IWithUnboundedS
     /// VirtualTag host instead of spawning a real <see cref="VirtualTagHostActor"/> child, so tests
     /// can intercept the <see cref="VirtualTagHostActor.ApplyVirtualTags"/> message. Null in
     /// production (the real host is spawned).</param>
-    /// <param name="loggerFactory">Retained for constructor-signature stability; unused since the
-    /// <c>EfAlarmConditionStateStore</c> fallback that consumed it was retired. Defaults to null.</param>
     /// <param name="scriptRootLogger">Optional root script logger required to spawn the ScriptedAlarm
     /// host (the engine + its script logging hang off it). When null the ScriptedAlarm host is left
     /// unspawned — the graceful dev/None-deployment path.</param>
@@ -712,7 +710,6 @@ public sealed class DriverHostActor : ReceiveActor, IWithTimers, IWithUnboundedS
         IVirtualTagEvaluator? virtualTagEvaluator = null,
         IHistoryWriter? historyWriter = null,
         IActorRef? virtualTagHostOverride = null,
-        ILoggerFactory? loggerFactory = null,
         ScriptRootLogger? scriptRootLogger = null,
         IActorRef? scriptedAlarmHostOverride = null,
         IDriverCapabilityInvokerFactory? invokerFactory = null,
@@ -743,7 +740,7 @@ public sealed class DriverHostActor : ReceiveActor, IWithTimers, IWithUnboundedS
         Akka.Actor.Props.Create(() => new DriverHostActor(
             dbFactory, localNode, ackRouter, driverFactory, localRoles, dependencyMux, opcUaPublishActor,
             healthPublisher, virtualTagEvaluator, historyWriter, virtualTagHostOverride,
-            loggerFactory, scriptRootLogger, scriptedAlarmHostOverride, invokerFactory, driverMemberCountProvider,
+            scriptRootLogger, scriptedAlarmHostOverride, invokerFactory, driverMemberCountProvider,
             deploymentArtifactCache, redundancyRoleView, replicationPeerHost, fetchAndCacheMode, artifactFetcher,
             alarmStateStore, telemetryHub, primaryRoleSource, historizationRoleView,
             sharesHistorizationScopeWithLocal, applyWedgeTimeout, reprovisionBackoff, commsRecoveryAuditDelay,
@@ -767,8 +764,6 @@ public sealed class DriverHostActor : ReceiveActor, IWithTimers, IWithUnboundedS
     /// for historized VirtualTag results; defaults to <see cref="NullHistoryWriter"/>.</param>
     /// <param name="virtualTagHostOverride">Test seam: when supplied, used as the VirtualTag host
     /// instead of spawning a real <see cref="VirtualTagHostActor"/> child.</param>
-    /// <param name="loggerFactory">Retained for constructor-signature stability; unused since the
-    /// <c>EfAlarmConditionStateStore</c> fallback that consumed it was retired. Defaults to null.</param>
     /// <param name="scriptRootLogger">Optional root script logger required to spawn the ScriptedAlarm
     /// host; when null the host is left unspawned.</param>
     /// <param name="scriptedAlarmHostOverride">Test seam: when supplied, used as the ScriptedAlarm host
@@ -851,7 +846,6 @@ public sealed class DriverHostActor : ReceiveActor, IWithTimers, IWithUnboundedS
         IVirtualTagEvaluator? virtualTagEvaluator = null,
         IHistoryWriter? historyWriter = null,
         IActorRef? virtualTagHostOverride = null,
-        ILoggerFactory? loggerFactory = null,
         ScriptRootLogger? scriptRootLogger = null,
         IActorRef? scriptedAlarmHostOverride = null,
         IDriverCapabilityInvokerFactory? invokerFactory = null,
diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/ServiceCollectionExtensions.cs b/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/ServiceCollectionExtensions.cs
index 17237391..ea327b42 100644
--- a/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/ServiceCollectionExtensions.cs
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/ServiceCollectionExtensions.cs
@@ -609,7 +609,6 @@ public static class ServiceCollectionExtensions
                     healthPublisher: healthPublisher,
                     virtualTagEvaluator: virtualTagEvaluator,
                     historyWriter: historyWriter,
-                    loggerFactory: loggerFactory,
                     scriptRootLogger: scriptRootLogger,
                     invokerFactory: invokerFactory,
                     deploymentArtifactCache: deploymentArtifactCache,