diff --git a/src/sgwc/pfcp-sm.c b/src/sgwc/pfcp-sm.c
index 8b3378d0d..e9e662066 100644
--- a/src/sgwc/pfcp-sm.c
+++ b/src/sgwc/pfcp-sm.c
@@ -135,7 +135,7 @@ void sgwc_pfcp_state_will_associate(ogs_fsm_t *s, sgwc_event_t *e)
             OGS_FSM_TRAN(s, sgwc_pfcp_state_associated);
             break;
         default:
-            ogs_error("cannot handle PFCP message type[%d]",
+            ogs_warn("cannot handle PFCP message type[%d]",
                     message->h.type);
             break;
         }
diff --git a/src/sgwu/pfcp-sm.c b/src/sgwu/pfcp-sm.c
index de89d821c..be7f7b1fa 100644
--- a/src/sgwu/pfcp-sm.c
+++ b/src/sgwu/pfcp-sm.c
@@ -131,7 +131,7 @@ void sgwu_pfcp_state_will_associate(ogs_fsm_t *s, sgwu_event_t *e)
             OGS_FSM_TRAN(s, sgwu_pfcp_state_associated);
             break;
         default:
-            ogs_error("cannot handle PFCP message type[%d]",
+            ogs_warn("cannot handle PFCP message type[%d]",
                     message->h.type);
             break;
         }
diff --git a/src/smf/pfcp-path.c b/src/smf/pfcp-path.c
index 9d2ceda0f..94340165b 100644
--- a/src/smf/pfcp-path.c
+++ b/src/smf/pfcp-path.c
@@ -224,7 +224,7 @@ static void sess_epc_timeout(ogs_pfcp_xact_t *xact, void *data)
 
     switch (type) {
     case OGS_PFCP_SESSION_ESTABLISHMENT_REQUEST_TYPE:
-        ogs_error("No PFCP session establishment response");
+        ogs_warn("No PFCP session establishment response");
         break;
     case OGS_PFCP_SESSION_MODIFICATION_REQUEST_TYPE:
         ogs_error("No PFCP session modification response");
diff --git a/src/smf/pfcp-sm.c b/src/smf/pfcp-sm.c
index aa4e4aa03..a208b42d6 100644
--- a/src/smf/pfcp-sm.c
+++ b/src/smf/pfcp-sm.c
@@ -137,7 +137,7 @@ void smf_pfcp_state_will_associate(ogs_fsm_t *s, smf_event_t *e)
             OGS_FSM_TRAN(s, smf_pfcp_state_associated);
             break;
         default:
-            ogs_error("cannot handle PFCP message type[%d]",
+            ogs_warn("cannot handle PFCP message type[%d]",
                     message->h.type);
             break;
         }
diff --git a/src/smf/s5c-handler.c b/src/smf/s5c-handler.c
index 0f1f7927b..e970a79ac 100644
--- a/src/smf/s5c-handler.c
+++ b/src/smf/s5c-handler.c
@@ -115,7 +115,7 @@ void smf_s5c_handle_create_session_request(
     }
 
     if (!ogs_diam_peer_connected()) {
-        ogs_error("No Diameter Peer");
+        ogs_warn("No Diameter Peer");
         cause_value = OGS_GTP_CAUSE_REMOTE_PEER_NOT_RESPONDING;
     }
 
diff --git a/src/upf/gtp-path.c b/src/upf/gtp-path.c
index 482ceb15b..62e074529 100644
--- a/src/upf/gtp-path.c
+++ b/src/upf/gtp-path.c
@@ -204,8 +204,10 @@ static void _gtpv1_u_recv_cb(short when, ogs_socket_t fd, void *data)
 
     pdr = ogs_pfcp_pdr_find_by_teid_and_qfi(teid, qfi);
     if (!pdr) {
+#if 0 /* It's redundant log message */
         ogs_warn("[DROP] Cannot find PDR : UPF-N3-TEID[0x%x] QFI[%d]",
                 teid, qfi);
+#endif
         goto cleanup;
     }
     ogs_assert(pdr->sess);
diff --git a/src/upf/pfcp-sm.c b/src/upf/pfcp-sm.c
index 6f3656836..1af1d5c2e 100644
--- a/src/upf/pfcp-sm.c
+++ b/src/upf/pfcp-sm.c
@@ -136,7 +136,7 @@ void upf_pfcp_state_will_associate(ogs_fsm_t *s, upf_event_t *e)
             OGS_FSM_TRAN(s, upf_pfcp_state_associated);
             break;
         default:
-            ogs_error("cannot handle PFCP message type[%d]",
+            ogs_warn("cannot handle PFCP message type[%d]",
                     message->h.type);
             break;
         }