diff --git a/app/src/Lib/Traits/PluggableModelTrait.php b/app/src/Lib/Traits/PluggableModelTrait.php
index b66b8bce5..5d413e979 100644
--- a/app/src/Lib/Traits/PluggableModelTrait.php
+++ b/app/src/Lib/Traits/PluggableModelTrait.php
@@ -142,11 +142,19 @@ protected function setPluginRelations() {
     // once per instantiation.
 
     $models = $this->find()
-                   ->select('plugin')
+                   ->select(['id', 'plugin'])
                    ->distinct(['plugin'])
                    ->all();
-
+    
     foreach($models as $m) {
+      if(empty($m->plugin) || !strstr($m->plugin, '.')) {
+        // This plugin is not valid. We could filter this in the find() using a
+        // where() clause, but checking here allows us to emit a warning.
+
+        $this->llog('error', "Ignoring invalid plugin found in " . $this->getTable() . " record " . $m->id);
+        continue;
+      }
+
       // In general, a model with a "plugin" field has a 1-1 relation
       // with the instantiated plugin configuration. eg: One instance
       // of a Server has exactly one SqlServer associated with it.
diff --git a/app/src/Model/Table/IdentifierAssignmentsTable.php b/app/src/Model/Table/IdentifierAssignmentsTable.php
index ea6ac0730..b0325c9f6 100644
--- a/app/src/Model/Table/IdentifierAssignmentsTable.php
+++ b/app/src/Model/Table/IdentifierAssignmentsTable.php
@@ -136,7 +136,10 @@ public function initialize(array $config): void {
    * Assign Identifiers for an Entity.
    * 
    * @since  COmanage Registry v5.0.0
-* XXX Document params
+   * @param  string $entityType     Entity Table (eg: "People")
+   * @param  int    $entityId       Entity ID
+   * @param  bool   $provision      Whether or not to run provisioners after assignment
+   * @param  int    $actorPersonId  Person ID of Actor assigning identifiers
    */
 
   public function assign(
@@ -470,7 +473,7 @@ public function validationDefault(Validator $validator): Validator {
     ]);
     $validator->notEmptyString('status');
 
-    $this->registerStringValidation($validator, $schema, 'plugin', false);
+    $this->registerStringValidation($validator, $schema, 'plugin', true);
     
     $validator->add('context', [
       'content' => ['rule' => ['inList', IdentifierAssignmentContextEnum::getConstValues()]]
diff --git a/app/src/Model/Table/ServersTable.php b/app/src/Model/Table/ServersTable.php
index 3980bb804..6f29d004c 100644
--- a/app/src/Model/Table/ServersTable.php
+++ b/app/src/Model/Table/ServersTable.php
@@ -162,7 +162,7 @@ public function validationDefault(Validator $validator): Validator {
     ]);
     $validator->notEmptyString('status');
 
-    $this->registerStringValidation($validator, $schema, 'plugin', false);
+    $this->registerStringValidation($validator, $schema, 'plugin', true);
     
     return $validator; 
   }