diff --git a/examples/network-manager-app/network-manager-common/network-manager-app.matter b/examples/network-manager-app/network-manager-common/network-manager-app.matter
index b5760ecb46703b..a91e5664fcf32e 100644
--- a/examples/network-manager-app/network-manager-common/network-manager-app.matter
+++ b/examples/network-manager-app/network-manager-common/network-manager-app.matter
@@ -1178,11 +1178,11 @@ endpoint 0 {
     callback attribute serverList;
     callback attribute clientList;
     callback attribute partsList;
-    callback attribute generatedCommandList default = 0;
-    callback attribute acceptedCommandList default = 0;
-    callback attribute attributeList default = 0;
+    callback attribute generatedCommandList;
+    callback attribute acceptedCommandList;
+    callback attribute attributeList;
     ram      attribute featureMap default = 0;
-    callback attribute clusterRevision default = 1;
+    callback attribute clusterRevision;
   }
 
   server cluster AccessControl {
@@ -1190,32 +1190,32 @@ endpoint 0 {
     emits event AccessControlExtensionChanged;
     callback attribute acl;
     callback attribute extension;
-    callback attribute subjectsPerAccessControlEntry default = 4;
-    callback attribute targetsPerAccessControlEntry default = 3;
-    callback attribute accessControlEntriesPerFabric default = 3;
-    callback attribute generatedCommandList default = 0;
-    callback attribute acceptedCommandList default = 0;
+    callback attribute subjectsPerAccessControlEntry;
+    callback attribute targetsPerAccessControlEntry;
+    callback attribute accessControlEntriesPerFabric;
+    callback attribute generatedCommandList;
+    callback attribute acceptedCommandList;
     callback attribute attributeList;
     ram      attribute featureMap default = 0;
-    callback attribute clusterRevision default = 1;
+    callback attribute clusterRevision;
   }
 
   server cluster BasicInformation {
     emits event StartUp;
     emits event ShutDown;
     emits event Leave;
-    callback attribute dataModelRevision default = 10;
+    callback attribute dataModelRevision;
     callback attribute vendorName;
     callback attribute vendorID;
     callback attribute productName;
     callback attribute productID;
     persist  attribute nodeLabel;
-    callback attribute location default = "XX";
-    callback attribute hardwareVersion default = 0;
+    callback attribute location;
+    callback attribute hardwareVersion;
     callback attribute hardwareVersionString;
-    callback attribute softwareVersion default = 0;
+    callback attribute softwareVersion;
     callback attribute softwareVersionString;
-    callback attribute manufacturingDate default = "20210614123456ZZ";
+    callback attribute manufacturingDate;
     callback attribute partNumber;
     callback attribute productURL;
     callback attribute productLabel;
@@ -1226,9 +1226,9 @@ endpoint 0 {
     callback attribute capabilityMinima;
     callback attribute specificationVersion;
     callback attribute maxPathsPerInvoke;
-    callback attribute generatedCommandList default = 0;
-    callback attribute acceptedCommandList default = 0;
-    callback attribute attributeList default = 0;
+    callback attribute generatedCommandList;
+    callback attribute acceptedCommandList;
+    callback attribute attributeList;
     ram      attribute featureMap default = 0;
     ram      attribute clusterRevision default = 3;
   }
@@ -1236,12 +1236,12 @@ endpoint 0 {
   server cluster GeneralCommissioning {
     ram      attribute breadcrumb default = 0x0000000000000000;
     callback attribute basicCommissioningInfo;
-    callback attribute regulatoryConfig default = 0;
-    callback attribute locationCapability default = 0;
-    callback attribute supportsConcurrentConnection default = 1;
-    callback attribute generatedCommandList default = 0;
-    callback attribute acceptedCommandList default = 0;
-    callback attribute attributeList default = 0;
+    callback attribute regulatoryConfig;
+    callback attribute locationCapability;
+    callback attribute supportsConcurrentConnection;
+    callback attribute generatedCommandList;
+    callback attribute acceptedCommandList;
+    callback attribute attributeList;
     ram      attribute featureMap default = 0;
     ram      attribute clusterRevision default = 1;
 
@@ -1260,9 +1260,9 @@ endpoint 0 {
     callback attribute lastNetworkingStatus;
     callback attribute lastNetworkID;
     callback attribute lastConnectErrorValue;
-    callback attribute generatedCommandList default = 0;
-    callback attribute acceptedCommandList default = 0;
-    callback attribute attributeList default = 0;
+    callback attribute generatedCommandList;
+    callback attribute acceptedCommandList;
+    callback attribute attributeList;
     callback attribute featureMap default = 0;
     ram      attribute clusterRevision default = 1;
   }
@@ -1273,17 +1273,17 @@ endpoint 0 {
     emits event NetworkFaultChange;
     emits event BootReason;
     callback attribute networkInterfaces;
-    callback attribute rebootCount default = 0x0000;
-    callback attribute upTime default = 0x0000000000000000;
-    callback attribute totalOperationalHours default = 0x00000000;
+    callback attribute rebootCount;
+    callback attribute upTime;
+    callback attribute totalOperationalHours;
     callback attribute bootReason;
     callback attribute activeHardwareFaults;
     callback attribute activeRadioFaults;
     callback attribute activeNetworkFaults;
     callback attribute testEventTriggersEnabled default = false;
-    callback attribute generatedCommandList default = 0;
-    callback attribute acceptedCommandList default = 0;
-    callback attribute attributeList default = 0;
+    callback attribute generatedCommandList;
+    callback attribute acceptedCommandList;
+    callback attribute attributeList;
     ram      attribute featureMap default = 0;
     ram      attribute clusterRevision default = 0x0002;
 
@@ -1296,8 +1296,8 @@ endpoint 0 {
     callback attribute channel;
     callback attribute routingRole;
     callback attribute networkName;
-    callback attribute panId default = 0x0000;
-    callback attribute extendedPanId default = 0x0000000000000000;
+    callback attribute panId;
+    callback attribute extendedPanId;
     callback attribute meshLocalPrefix;
     callback attribute neighborTable;
     callback attribute routeTable;
@@ -1325,16 +1325,16 @@ endpoint 0 {
     callback attribute bssid;
     callback attribute securityType;
     callback attribute wiFiVersion;
-    callback attribute channelNumber default = 0x0000;
-    callback attribute rssi default = 0x00;
-    callback attribute beaconLostCount default = 0x00000000;
-    callback attribute beaconRxCount default = 0x00000000;
-    callback attribute packetMulticastRxCount default = 0x00000000;
-    callback attribute packetMulticastTxCount default = 0x00000000;
-    callback attribute packetUnicastRxCount default = 0x00000000;
-    callback attribute packetUnicastTxCount default = 0x00000000;
-    callback attribute currentMaxRate default = 0x0000000000000000;
-    callback attribute overrunCount default = 0x0000000000000000;
+    callback attribute channelNumber;
+    callback attribute rssi;
+    callback attribute beaconLostCount;
+    callback attribute beaconRxCount;
+    callback attribute packetMulticastRxCount;
+    callback attribute packetMulticastTxCount;
+    callback attribute packetUnicastRxCount;
+    callback attribute packetUnicastTxCount;
+    callback attribute currentMaxRate;
+    callback attribute overrunCount;
     ram      attribute featureMap default = 3;
     ram      attribute clusterRevision default = 1;
 
@@ -1352,12 +1352,12 @@ endpoint 0 {
   }
 
   server cluster AdministratorCommissioning {
-    callback attribute windowStatus default = 0;
-    callback attribute adminFabricIndex default = 1;
-    callback attribute adminVendorId default = 0;
-    callback attribute generatedCommandList default = 0;
-    callback attribute acceptedCommandList default = 0;
-    callback attribute attributeList default = 0;
+    callback attribute windowStatus;
+    callback attribute adminFabricIndex;
+    callback attribute adminVendorId;
+    callback attribute generatedCommandList;
+    callback attribute acceptedCommandList;
+    callback attribute attributeList;
     ram      attribute featureMap default = 0;
     ram      attribute clusterRevision default = 1;
 
@@ -1372,9 +1372,9 @@ endpoint 0 {
     callback attribute commissionedFabrics;
     callback attribute trustedRootCertificates;
     callback attribute currentFabricIndex;
-    callback attribute generatedCommandList default = 0;
-    callback attribute acceptedCommandList default = 0;
-    callback attribute attributeList default = 0;
+    callback attribute generatedCommandList;
+    callback attribute acceptedCommandList;
+    callback attribute attributeList;
     ram      attribute featureMap default = 0;
     ram      attribute clusterRevision default = 1;
 
@@ -1397,8 +1397,8 @@ endpoint 0 {
     callback attribute groupTable;
     callback attribute maxGroupsPerFabric;
     callback attribute maxGroupKeysPerFabric;
-    callback attribute featureMap default = 0;
-    callback attribute clusterRevision default = 1;
+    callback attribute featureMap;
+    callback attribute clusterRevision;
 
     handle command KeySetWrite;
     handle command KeySetRead;
@@ -1422,7 +1422,7 @@ endpoint 1 {
     callback attribute eventList;
     callback attribute attributeList;
     ram      attribute featureMap default = 0;
-    callback attribute clusterRevision default = 2;
+    callback attribute clusterRevision;
   }
 }