diff --git a/api/go/api/device.pb.go b/api/go/api/device.pb.go
index 8075e559..469083e9 100644
--- a/api/go/api/device.pb.go
+++ b/api/go/api/device.pb.go
@@ -1175,12 +1175,13 @@ type DeviceActivation struct {
 	// Application session key (HEX encoded).
 	AppSKey string `protobuf:"bytes,3,opt,name=app_s_key,json=appSKey,proto3" json:"app_s_key,omitempty"`
 	// Network session encryption key (HEX encoded).
-	// Note: For ABP in LoRaWAN 1.0.x, use this, the serving and the forwarding
-	// network session integrity key fields with the LoRaWAN 1.0.x 'NwkSKey`!
+	// Note: For LoRaWAN 1.0.x devices, set this to the NwkSKey.
 	NwkSEncKey string `protobuf:"bytes,4,opt,name=nwk_s_enc_key,json=nwkSEncKey,proto3" json:"nwk_s_enc_key,omitempty"`
 	// Serving network session integrity key (HEX encoded).
+	// Note: For LoRaWAN 1.0.x devices, set this to the NwkSKey.
 	SNwkSIntKey string `protobuf:"bytes,8,opt,name=s_nwk_s_int_key,json=sNwkSIntKey,proto3" json:"s_nwk_s_int_key,omitempty"`
 	// Forwarding network session integrity key (HEX encoded).
+	// Note: For LoRaWAN 1.0.x devices, set this to the NwkSKey.
 	FNwkSIntKey string `protobuf:"bytes,9,opt,name=f_nwk_s_int_key,json=fNwkSIntKey,proto3" json:"f_nwk_s_int_key,omitempty"`
 	// Uplink frame-counter.
 	FCntUp uint32 `protobuf:"varint,5,opt,name=f_cnt_up,json=fCntUp,proto3" json:"f_cnt_up,omitempty"`
diff --git a/api/proto/api/device.proto b/api/proto/api/device.proto
index 49fad456..c2042397 100644
--- a/api/proto/api/device.proto
+++ b/api/proto/api/device.proto
@@ -412,14 +412,15 @@ message DeviceActivation {
   string app_s_key = 3;
 
   // Network session encryption key (HEX encoded).
-  // Note: For ABP in LoRaWAN 1.0.x, use this, the serving and the forwarding
-  // network session integrity key fields with the LoRaWAN 1.0.x 'NwkSKey`!
+  // Note: For LoRaWAN 1.0.x devices, set this to the NwkSKey.
   string nwk_s_enc_key = 4;
 
   // Serving network session integrity key (HEX encoded).
+  // Note: For LoRaWAN 1.0.x devices, set this to the NwkSKey.
   string s_nwk_s_int_key = 8;
 
   // Forwarding network session integrity key (HEX encoded).
+  // Note: For LoRaWAN 1.0.x devices, set this to the NwkSKey.
   string f_nwk_s_int_key = 9;
 
   // Uplink frame-counter.
diff --git a/api/rust/proto/chirpstack/api/device.proto b/api/rust/proto/chirpstack/api/device.proto
index 49fad456..c2042397 100644
--- a/api/rust/proto/chirpstack/api/device.proto
+++ b/api/rust/proto/chirpstack/api/device.proto
@@ -412,14 +412,15 @@ message DeviceActivation {
   string app_s_key = 3;
 
   // Network session encryption key (HEX encoded).
-  // Note: For ABP in LoRaWAN 1.0.x, use this, the serving and the forwarding
-  // network session integrity key fields with the LoRaWAN 1.0.x 'NwkSKey`!
+  // Note: For LoRaWAN 1.0.x devices, set this to the NwkSKey.
   string nwk_s_enc_key = 4;
 
   // Serving network session integrity key (HEX encoded).
+  // Note: For LoRaWAN 1.0.x devices, set this to the NwkSKey.
   string s_nwk_s_int_key = 8;
 
   // Forwarding network session integrity key (HEX encoded).
+  // Note: For LoRaWAN 1.0.x devices, set this to the NwkSKey.
   string f_nwk_s_int_key = 9;
 
   // Uplink frame-counter.