diff --git a/configs/open5gs/amf.yaml.in b/configs/open5gs/amf.yaml.in
index 7e939e81c..f765397c3 100644
--- a/configs/open5gs/amf.yaml.in
+++ b/configs/open5gs/amf.yaml.in
@@ -254,11 +254,9 @@ nrf:
 #  o Prefer IPv4 instead of IPv6 for estabishing new GTP connections.
 #      prefer_ipv4: true
 #
-#  o Enable Multicast traffic to the UE
-#      multicast: true
-#
-#  o Disable Stateless Address Autoconfiguration for IPv6
-#      no_slaac: true
+#  o AMF ignores the UE Requested NSSAI and creates an allowed-NSSAI
+#    based on the Default S-NSSAI in the Subscription DB.
+#      ignore_requested_nssai: true
 #
 parameter:
 
diff --git a/configs/open5gs/ausf.yaml.in b/configs/open5gs/ausf.yaml.in
index cb8fd2a7d..fbd0b38d7 100644
--- a/configs/open5gs/ausf.yaml.in
+++ b/configs/open5gs/ausf.yaml.in
@@ -126,12 +126,6 @@ nrf:
 #  o Prefer IPv4 instead of IPv6 for estabishing new GTP connections.
 #      prefer_ipv4: true
 #
-#  o Enable Multicast traffic to the UE
-#      multicast: true
-#
-#  o Disable Stateless Address Autoconfiguration for IPv6
-#      no_slaac: true
-#
 parameter:
 
 #
diff --git a/configs/open5gs/hss.yaml.in b/configs/open5gs/hss.yaml.in
index d07602bfb..deef15251 100644
--- a/configs/open5gs/hss.yaml.in
+++ b/configs/open5gs/hss.yaml.in
@@ -41,12 +41,6 @@ hss:
 #  o Prefer IPv4 instead of IPv6 for estabishing new GTP connections.
 #      prefer_ipv4: true
 #
-#  o Enable Multicast traffic to the UE
-#      multicast: true
-#
-#  o Disable Stateless Address Autoconfiguration for IPv6
-#      no_slaac: true
-#
 parameter:
 
 #
diff --git a/configs/open5gs/mme.yaml.in b/configs/open5gs/mme.yaml.in
index e1968dd08..592d80c8f 100644
--- a/configs/open5gs/mme.yaml.in
+++ b/configs/open5gs/mme.yaml.in
@@ -347,12 +347,6 @@ smf:
 #  o Prefer IPv4 instead of IPv6 for estabishing new GTP connections.
 #      prefer_ipv4: true
 #
-#  o Enable Multicast traffic to the UE
-#      multicast: true
-#
-#  o Disable Stateless Address Autoconfiguration for IPv6
-#      no_slaac: true
-#
 #  o Use OAI UE
 #    - Remove HashMME in Security-mode command message
 #    - Use the length 1 of EPS network feature support in Attach accept message
diff --git a/configs/open5gs/nrf.yaml.in b/configs/open5gs/nrf.yaml.in
index c3d47e068..abfed29f4 100644
--- a/configs/open5gs/nrf.yaml.in
+++ b/configs/open5gs/nrf.yaml.in
@@ -87,12 +87,6 @@ nrf:
 #  o Prefer IPv4 instead of IPv6 for estabishing new GTP connections.
 #      prefer_ipv4: true
 #
-#  o Enable Multicast traffic to the UE
-#      multicast: true
-#
-#  o Disable Stateless Address Autoconfiguration for IPv6
-#      no_slaac: true
-#
 parameter:
 
 #
diff --git a/configs/open5gs/nssf.yaml.in b/configs/open5gs/nssf.yaml.in
index ecd4f7e2d..b8657991f 100644
--- a/configs/open5gs/nssf.yaml.in
+++ b/configs/open5gs/nssf.yaml.in
@@ -168,12 +168,6 @@ nrf:
 #  o Prefer IPv4 instead of IPv6 for estabishing new GTP connections.
 #      prefer_ipv4: true
 #
-#  o Enable Multicast traffic to the UE
-#      multicast: true
-#
-#  o Disable Stateless Address Autoconfiguration for IPv6
-#      no_slaac: true
-#
 parameter:
 
 #
diff --git a/configs/open5gs/pcf.yaml.in b/configs/open5gs/pcf.yaml.in
index f533af374..0c49a7453 100644
--- a/configs/open5gs/pcf.yaml.in
+++ b/configs/open5gs/pcf.yaml.in
@@ -128,12 +128,6 @@ nrf:
 #  o Prefer IPv4 instead of IPv6 for estabishing new GTP connections.
 #      prefer_ipv4: true
 #
-#  o Enable Multicast traffic to the UE
-#      multicast: true
-#
-#  o Disable Stateless Address Autoconfiguration for IPv6
-#      no_slaac: true
-#
 parameter:
 
 #
diff --git a/configs/open5gs/pcrf.yaml.in b/configs/open5gs/pcrf.yaml.in
index ad6c98a5d..5b9349c41 100644
--- a/configs/open5gs/pcrf.yaml.in
+++ b/configs/open5gs/pcrf.yaml.in
@@ -40,12 +40,6 @@ pcrf:
 #  o Prefer IPv4 instead of IPv6 for estabishing new GTP connections.
 #      prefer_ipv4: true
 #
-#  o Enable Multicast traffic to the UE
-#      multicast: true
-#
-#  o Disable Stateless Address Autoconfiguration for IPv6
-#      no_slaac: true
-#
 #  o Legacy support for pre-release LTE 11 devices to do calling
 #    - Replace IPv4/v6 local addr field in AAR Media-Subcomponent AVP by any
 #      no_ipv4v6_local_addr_in_packet_filter: true
diff --git a/configs/open5gs/sgwc.yaml.in b/configs/open5gs/sgwc.yaml.in
index b8165ea6c..b19b6fcc6 100644
--- a/configs/open5gs/sgwc.yaml.in
+++ b/configs/open5gs/sgwc.yaml.in
@@ -126,12 +126,6 @@ sgwu:
 #  o Prefer IPv4 instead of IPv6 for estabishing new GTP connections.
 #      prefer_ipv4: true
 #
-#  o Enable Multicast traffic to the UE
-#      multicast: true
-#
-#  o Disable Stateless Address Autoconfiguration for IPv6
-#      no_slaac: true
-#
 parameter:
 
 #
diff --git a/configs/open5gs/sgwu.yaml.in b/configs/open5gs/sgwu.yaml.in
index e635e463c..79bd05145 100644
--- a/configs/open5gs/sgwu.yaml.in
+++ b/configs/open5gs/sgwu.yaml.in
@@ -113,12 +113,6 @@ sgwc:
 #  o Prefer IPv4 instead of IPv6 for estabishing new GTP connections.
 #      prefer_ipv4: true
 #
-#  o Enable Multicast traffic to the UE
-#      multicast: true
-#
-#  o Disable Stateless Address Autoconfiguration for IPv6
-#      no_slaac: true
-#
 parameter:
 
 #
diff --git a/configs/open5gs/smf.yaml.in b/configs/open5gs/smf.yaml.in
index d45aa60f8..728b0835f 100644
--- a/configs/open5gs/smf.yaml.in
+++ b/configs/open5gs/smf.yaml.in
@@ -444,12 +444,6 @@ upf:
 #  o Prefer IPv4 instead of IPv6 for estabishing new GTP connections.
 #      prefer_ipv4: true
 #
-#  o Enable Multicast traffic to the UE
-#      multicast: true
-#
-#  o Disable Stateless Address Autoconfiguration for IPv6
-#      no_slaac: true
-#
 parameter:
 
 #
diff --git a/configs/open5gs/udm.yaml.in b/configs/open5gs/udm.yaml.in
index eb1ab2859..0a1140813 100644
--- a/configs/open5gs/udm.yaml.in
+++ b/configs/open5gs/udm.yaml.in
@@ -126,12 +126,6 @@ nrf:
 #  o Prefer IPv4 instead of IPv6 for estabishing new GTP connections.
 #      prefer_ipv4: true
 #
-#  o Enable Multicast traffic to the UE
-#      multicast: true
-#
-#  o Disable Stateless Address Autoconfiguration for IPv6
-#      no_slaac: true
-#
 parameter:
 
 #
diff --git a/configs/open5gs/udr.yaml.in b/configs/open5gs/udr.yaml.in
index aa078a3c0..2d52cc15b 100644
--- a/configs/open5gs/udr.yaml.in
+++ b/configs/open5gs/udr.yaml.in
@@ -128,12 +128,6 @@ nrf:
 #  o Prefer IPv4 instead of IPv6 for estabishing new GTP connections.
 #      prefer_ipv4: true
 #
-#  o Enable Multicast traffic to the UE
-#      multicast: true
-#
-#  o Disable Stateless Address Autoconfiguration for IPv6
-#      no_slaac: true
-#
 parameter:
 
 #
diff --git a/configs/open5gs/upf.yaml.in b/configs/open5gs/upf.yaml.in
index c570232bc..b95623370 100644
--- a/configs/open5gs/upf.yaml.in
+++ b/configs/open5gs/upf.yaml.in
@@ -172,13 +172,6 @@ smf:
 #  o Prefer IPv4 instead of IPv6 for estabishing new GTP connections.
 #      prefer_ipv4: true
 #
-#  o Enable Multicast traffic to the UE
-#      multicast: true
-#
-#  o Disable Stateless Address Autoconfiguration for IPv6
-#      no_slaac: true
-#
-#
 parameter:
 
 #
diff --git a/lib/app/ogs-context.c b/lib/app/ogs-context.c
index 37cd5aaa6..5fc5d0434 100644
--- a/lib/app/ogs-context.c
+++ b/lib/app/ogs-context.c
@@ -339,6 +339,9 @@ int ogs_app_context_parse_config(void)
                     parameter_key, "no_ipv4v6_local_addr_in_packet_filter")) {
                     self.parameter.no_ipv4v6_local_addr_in_packet_filter =
                         ogs_yaml_iter_bool(&parameter_iter);
+                } else if (!strcmp(parameter_key, "ignore_requested_nssai")) {
+                    self.parameter.ignore_requested_nssai =
+                        ogs_yaml_iter_bool(&parameter_iter);
                 } else
                     ogs_warn("unknown key `%s`", parameter_key);
             }
diff --git a/lib/app/ogs-context.h b/lib/app/ogs-context.h
index d4137d9ae..7246e83c4 100644
--- a/lib/app/ogs-context.h
+++ b/lib/app/ogs-context.h
@@ -75,6 +75,7 @@ typedef struct ogs_app_context_s {
 
         int use_openair;
         int no_ipv4v6_local_addr_in_packet_filter;
+        int ignore_requested_nssai;
     } parameter;
 
     ogs_sockopt_t sockopt;
diff --git a/lib/nas/5gs/types.c b/lib/nas/5gs/types.c
index 149509053..17bd32d58 100644
--- a/lib/nas/5gs/types.c
+++ b/lib/nas/5gs/types.c
@@ -258,7 +258,7 @@ int ogs_nas_parse_nssai(
 
     if (!nas_nssai->length) {
         ogs_error("No NSSAI [%p:%d]", nas_nssai->buffer, nas_nssai->length);
-        return OGS_ERROR;
+        return 0;
     }
 
     while (pos < nas_nssai->length &&
diff --git a/src/amf/gmm-handler.c b/src/amf/gmm-handler.c
index b36fb7765..3c9a920af 100644
--- a/src/amf/gmm-handler.c
+++ b/src/amf/gmm-handler.c
@@ -239,7 +239,8 @@ int gmm_handle_registration_update(amf_ue_t *amf_ue,
         }
 
         if (i == amf_ue->requested_nssai.num_of_s_nssai) {
-            ogs_error("CHECK CONFIGURATION: Cannot find Requested NSSAI");
+            ogs_error("Cannot find Requested NSSAI [%d]",
+                    amf_ue->requested_nssai.num_of_s_nssai);
             for (i = 0; i < amf_ue->requested_nssai.num_of_s_nssai; i++) {
                 ogs_error("    PLMN_ID[MCC:%d MNC:%d]",
                         ogs_plmn_id_mcc(&amf_ue->nr_tai.plmn_id),
diff --git a/src/amf/nudm-handler.c b/src/amf/nudm-handler.c
index beb697f53..597bca9a3 100644
--- a/src/amf/nudm-handler.c
+++ b/src/amf/nudm-handler.c
@@ -165,7 +165,8 @@ int amf_nudm_sdm_handle_provisioned(
         amf_ue->allowed_nssai.num_of_s_nssai = 0;
         amf_ue->rejected_nssai.num_of_s_nssai = 0;
 
-        if (amf_ue->requested_nssai.num_of_s_nssai) {
+        if (ogs_app()->parameter.ignore_requested_nssai == 0 &&
+            amf_ue->requested_nssai.num_of_s_nssai) {
             for (i = 0; i < amf_ue->requested_nssai.num_of_s_nssai; i++) {
                 ogs_slice_data_t *slice = NULL;
                 ogs_nas_s_nssai_ie_t *requested =
@@ -224,12 +225,26 @@ int amf_nudm_sdm_handle_provisioned(
         if (amf_ue->allowed_nssai.num_of_s_nssai) {
             amf_ue->allowed_nssai_present = true;
         } else {
-            ogs_error("CHECK DATABASE: Cannot create Allowed-NSSAI");
+            ogs_error("No Allowed-NSSAI");
+            ogs_error("    Number of Subscribed S-NSSAI [%d]",
+                    amf_ue->num_of_slice);
+            for (i = 0; i < amf_ue->num_of_slice; i++) {
+                ogs_slice_data_t *slice = &amf_ue->slice[i];
+                if (slice->default_indicator == true) {
+                    ogs_error("        Default S_NSSAI[SST:%d SD:0x%x]",
+                            slice->s_nssai.sst, slice->s_nssai.sd.v);
+                } else {
+                    ogs_error("        S_NSSAI[SST:%d SD:0x%x]",
+                            slice->s_nssai.sst, slice->s_nssai.sd.v);
+                }
+            }
+            ogs_error("    Number of Requested NSSAI [%d]",
+                    amf_ue->requested_nssai.num_of_s_nssai);
             for (i = 0; i < amf_ue->requested_nssai.num_of_s_nssai; i++) {
-                ogs_error("    PLMN_ID[MCC:%d MNC:%d]",
+                ogs_error("        PLMN_ID[MCC:%d MNC:%d]",
                         ogs_plmn_id_mcc(&amf_ue->nr_tai.plmn_id),
                         ogs_plmn_id_mnc(&amf_ue->nr_tai.plmn_id));
-                ogs_error("    S_NSSAI[SST:%d SD:0x%x]",
+                ogs_error("        S_NSSAI[SST:%d SD:0x%x]",
                         amf_ue->requested_nssai.s_nssai[i].sst,
                         amf_ue->requested_nssai.s_nssai[i].sd.v);
             }