fixes #4100

Closes #4100

Merge request studip/studip!2950

lib/models/SimpleORMap.class.php

@@ -568,10 +568,11 @@ class SimpleORMap implements ArrayAccess, Countable, IteratorAggregate
         $record_data = [];
         $relation_data = [];
         foreach ($data as $key => $value) {
-            if (is_array($value)) {
-                $relation_data[$key] = $value;
-            } else {
+            $temp = static::alias_fields()[$key] ?? $key;
+            if (isset(static::db_fields()[$temp])) {
                 $record_data[$key] = $value;
+            } else {
+                $relation_data[$key] = $value;
             }
         }
         $record = static::toObject($record_data);
@@ -581,8 +582,11 @@ class SimpleORMap implements ArrayAccess, Countable, IteratorAggregate
         } else {
             $record->setData($record_data);
         }
-        if (is_array($relation_data)) {
         foreach ($relation_data as $relation => $data) {
+            if (!$record->isRelation($relation)) {
+                continue;
+            }
+
             $options = $record->getRelationOptions($relation);
             if ($options['type'] == 'has_one') {
                 $record->{$relation} = call_user_func([$options['class_name'], 'import'], $data);
@@ -607,7 +611,6 @@ class SimpleORMap implements ArrayAccess, Countable, IteratorAggregate
                 }
             }
         }
-        }
         return $record;
     }