diff --git a/internal/pkg/avcfg/omci_ani_config.go b/internal/pkg/avcfg/omci_ani_config.go
index fb1399a..e04c850 100755
--- a/internal/pkg/avcfg/omci_ani_config.go
+++ b/internal/pkg/avcfg/omci_ani_config.go
@@ -1399,7 +1399,10 @@
 		return
 	}
 	logger.Debugw(ctx, "UniPonAniConfigFsm DeleteResponse Data", log.Fields{"device-id": oFsm.deviceID, "data-fields": msgObj})
-	if msgObj.Result != me.Success {
+	if msgObj.Result == me.UnknownInstance {
+		logger.Warnw(ctx, "UniPonAniConfigFsm - Unknow Instance",
+			log.Fields{"device-id": oFsm.deviceID, "data-fields": msgObj, "Error": msgObj.Result})
+	} else if msgObj.Result != me.Success {
 		logger.Errorw(ctx, "UniPonAniConfigFsm - Omci DeleteResponse Error",
 			log.Fields{"device-id": oFsm.deviceID, "Error": msgObj.Result})
 		//TODO:  - later: possibly force FSM into abort or ignore some errors for some messages?
diff --git a/internal/pkg/avcfg/omci_vlan_config.go b/internal/pkg/avcfg/omci_vlan_config.go
index 2f8e37c..bfe1bc9 100755
--- a/internal/pkg/avcfg/omci_vlan_config.go
+++ b/internal/pkg/avcfg/omci_vlan_config.go
@@ -2127,7 +2127,10 @@
 			oFsm.deviceID)
 	}
 	logger.Debugw(ctx, "UniVlanConfigFsm DeleteResponse Data", log.Fields{"device-id": oFsm.deviceID, "data-fields": msgObj})
-	if msgObj.Result != me.Success {
+	if msgObj.Result == me.UnknownInstance {
+		logger.Warnw(ctx, "UniVlanConfigFsm - Unknow Instance",
+			log.Fields{"device-id": oFsm.deviceID, "data-fields": msgObj, "Error": msgObj.Result})
+	} else if msgObj.Result != me.Success {
 		logger.Errorw(ctx, "UniVlanConfigFsm - Omci DeleteResponse Error - later: drive FSM to abort state ?",
 			log.Fields{"device-id": oFsm.deviceID, "Error": msgObj.Result})
 		// possibly force FSM into abort or ignore some errors for some messages?