diff --git a/app/Models/Patient/PatientModel.php b/app/Models/Patient/PatientModel.php
index 5d26bdc..540cea5 100644
--- a/app/Models/Patient/PatientModel.php
+++ b/app/Models/Patient/PatientModel.php
@@ -119,9 +119,20 @@ class PatientModel extends BaseModel {
     $modelPatCom = new PatComModel();
     $modelPatIdt = new PatIdtModel();
 
+    // Extract nested data before filtering
+    $patIdt = $input['PatIdt'] ?? null;
+    $patCom = $input['PatCom'] ?? null;
+    $patAtt = $input['PatAtt'] ?? null;
+
+    // Remove nested arrays that don't belong to patient table
+    unset($input['PatIdt'], $input['PatCom'], $input['PatAtt']);
+
     if (!empty($input['Custodian'])) {
-        if (is_array($input['Custodian']) && isset($input['Custodian']['InternalPID'])) {
-            $input['Custodian'] = (int) $input['Custodian']['InternalPID'];
+        if (is_array($input['Custodian'])) {
+            $input['Custodian'] = $input['Custodian']['InternalPID'] ?? null;
+            if ($input['Custodian'] !== null) {
+                $input['Custodian'] = (int) $input['Custodian'];
+            }
         }
     }
 
@@ -134,23 +145,22 @@ class PatientModel extends BaseModel {
     $db->transBegin();
 
     try {
-
       $this->insert($input);
       $newInternalPID = $this->getInsertID();
       $this->checkDbError($db, 'Insert patient');
 
-      if (!empty($input['PatIdt'])) {
-        $modelPatIdt->createPatIdt($input['PatIdt'], $newInternalPID);
+      if (!empty($patIdt)) {
+        $modelPatIdt->createPatIdt($patIdt, $newInternalPID);
         $this->checkDbError($db, 'Insert PatIdt');
       }
 
-      if (!empty($input['PatCom'])) {
-        $modelPatCom->createPatCom($input['PatCom'], $newInternalPID);
+      if (!empty($patCom)) {
+        $modelPatCom->createPatCom($patCom, $newInternalPID);
         $this->checkDbError($db, 'Insert PatCom');
       }
 
-      if (!empty($input['PatAtt'])) {
-        $modelPatAtt->createPatAtt($input['PatAtt'], $newInternalPID);
+      if (!empty($patAtt)) {
+        $modelPatAtt->createPatAtt($patAtt, $newInternalPID);
         $this->checkDbError($db, 'Insert PatAtt');
       }
 
@@ -171,8 +181,11 @@ class PatientModel extends BaseModel {
     $modelPatAtt = new PatAttModel();
 
     if (!empty($input['Custodian'])) {
-        if (is_array($input['Custodian']) && isset($input['Custodian']['InternalPID'])) {
-            $input['Custodian'] = (int) $input['Custodian']['InternalPID'];
+        if (is_array($input['Custodian'])) {
+            $input['Custodian'] = $input['Custodian']['InternalPID'] ?? null;
+            if ($input['Custodian'] !== null) {
+                $input['Custodian'] = (int) $input['Custodian'];
+            }
         }
     }