diff --git a/app/src/Model/Table/ApiUsersTable.php b/app/src/Model/Table/ApiUsersTable.php
index 8a91c86f..44d7f3f5 100644
--- a/app/src/Model/Table/ApiUsersTable.php
+++ b/app/src/Model/Table/ApiUsersTable.php
@@ -188,14 +188,14 @@ public function validationDefault(Validator $validator) {
       'content',
       [ 'rule' => 'isInteger' ]
     );
-    $validator->allowEmptyFor('matchgrid_id', Validator::EMPTY_NULL);
+    $validator->allowEmpty('matchgrid_id');
     
     $validator->add(
       'system_of_record_id',
       'content',
       [ 'rule' => 'isInteger' ]
     );
-    $validator->allowEmptyFor('system_of_record_id', Validator::EMPTY_NULL);
+    $validator->allowEmpty('system_of_record_id');
     
     return $validator; 
   }
diff --git a/app/src/Model/Table/AttributesTable.php b/app/src/Model/Table/AttributesTable.php
index 67c1e066..15d0d4b2 100644
--- a/app/src/Model/Table/AttributesTable.php
+++ b/app/src/Model/Table/AttributesTable.php
@@ -136,7 +136,7 @@ public function validationDefault(Validator $validator) {
       'content',
       [ 'rule' => 'isInteger' ]
     );
-    $validator->allowEmptyFor('attribute_group_id', Validator::EMPTY_NULL);
+    $validator->allowEmpty('attribute_group_id');
     
     $validator->add(
       'alphanumeric',
@@ -202,7 +202,7 @@ public function validationDefault(Validator $validator) {
       'content',
       [ 'rule' => 'isInteger' ]
     );
-    $validator->allowEmptyFor('attribute_map_id', Validator::EMPTY_NULL);
+    $validator->allowEmpty('attribute_map_id');
     
     return $validator; 
   }
diff --git a/app/src/Model/Table/MatchgridSettingsTable.php b/app/src/Model/Table/MatchgridSettingsTable.php
index de9ad8bb..b3c8e87b 100644
--- a/app/src/Model/Table/MatchgridSettingsTable.php
+++ b/app/src/Model/Table/MatchgridSettingsTable.php
@@ -201,7 +201,7 @@ public function validationDefault(Validator $validator) {
       'content',
       [ 'rule' => [ 'range', 1, null ] ]
     );
-    $validator->allowEmptyFor('referenceid_start', Validator::EMPTY_NULL);
+    $validator->allowEmpty('referenceid_start');
     
     $validator->add(
       'referenceid_prefix',
diff --git a/app/src/Model/Table/PermissionsTable.php b/app/src/Model/Table/PermissionsTable.php
index ef972f24..0132d35f 100644
--- a/app/src/Model/Table/PermissionsTable.php
+++ b/app/src/Model/Table/PermissionsTable.php
@@ -104,7 +104,7 @@ public function validationDefault(Validator $validator) {
       'content',
       [ 'rule' => 'isInteger' ]
     );
-    $validator->allowEmptyFor('matchgrid_id', Validator::EMPTY_NULL);
+    $validator->allowEmpty('matchgrid_id');
     
     $validator->add(
       'permission',
diff --git a/app/src/Model/Table/RuleAttributesTable.php b/app/src/Model/Table/RuleAttributesTable.php
index 24698719..3bf702c0 100644
--- a/app/src/Model/Table/RuleAttributesTable.php
+++ b/app/src/Model/Table/RuleAttributesTable.php
@@ -112,7 +112,7 @@ public function validationDefault(Validator $validator) {
       'content',
       [ 'rule' => 'isInteger' ]
     );
-    $validator->allowEmptyFor('crosscheck_attribute_id', Validator::EMPTY_NULL);
+    $validator->allowEmpty('crosscheck_attribute_id');
     
     $validator->add(
       'search_type',
@@ -132,14 +132,14 @@ public function validationDefault(Validator $validator) {
       'toggle',
       [ 'rule' => [ 'boolean' ] ]
     );
-    $validator->allowEmptyFor('required', Validator::EMPTY_NULL);
+    $validator->allowEmpty('required');
     
     $validator->add(
       'match_empty',
       'toggle',
       [ 'rule' => [ 'boolean' ] ]
     );
-    $validator->allowEmptyFor('match_empty', Validator::EMPTY_NULL);
+    $validator->allowEmpty('match_empty');
 
     return $validator; 
   }