diff --git a/Models/CostCenterMapper.php b/Models/CostCenterMapper.php
index f764e87..3eab4ab 100644
--- a/Models/CostCenterMapper.php
+++ b/Models/CostCenterMapper.php
@@ -47,9 +47,9 @@ final class CostCenterMapper extends DataMapperAbstract
         'l11n' => [
             'mapper'        => L11nCostCenterMapper::class,
             'table'         => 'accounting_costcenter_l11n',
-            'external'      => 'accounting_costcenter_l11n_costcenter',
+            'self'      => 'accounting_costcenter_l11n_costcenter',
             'conditional'   => true,
-            'self'          => null,
+            'external'          => null,
         ],
     ];
 
diff --git a/Models/CostObjectMapper.php b/Models/CostObjectMapper.php
index 873bf99..58a4b38 100644
--- a/Models/CostObjectMapper.php
+++ b/Models/CostObjectMapper.php
@@ -47,9 +47,9 @@ final class CostObjectMapper extends DataMapperAbstract
         'l11n' => [
             'mapper'        => L11nCostObjectMapper::class,
             'table'         => 'accounting_costobject_l11n',
-            'external'      => 'accounting_costobject_l11n_costobject',
+            'self'      => 'accounting_costobject_l11n_costobject',
             'conditional'   => true,
-            'self'          => null,
+            'external'      => null,
         ],
     ];
 
diff --git a/Models/L11nCostCenterMapper.php b/Models/L11nCostCenterMapper.php
index 288142d..2fff96b 100644
--- a/Models/L11nCostCenterMapper.php
+++ b/Models/L11nCostCenterMapper.php
@@ -52,7 +52,7 @@ final class L11nCostCenterMapper extends DataMapperAbstract
     protected static array $ownsOne = [
         'language' => [
             'mapper'        => LanguageMapper::class,
-            'self'          => 'accounting_costcenter_l11n_language',
+            'external'          => 'accounting_costcenter_l11n_language',
             'by'            => 'code2',
             'column'        => 'code2',
             'conditional'   => true,
diff --git a/Models/L11nCostObjectMapper.php b/Models/L11nCostObjectMapper.php
index 006e881..e759ecc 100644
--- a/Models/L11nCostObjectMapper.php
+++ b/Models/L11nCostObjectMapper.php
@@ -52,7 +52,7 @@ final class L11nCostObjectMapper extends DataMapperAbstract
     protected static array $ownsOne = [
         'language' => [
             'mapper'        => LanguageMapper::class,
-            'self'          => 'accounting_costobject_l11n_language',
+            'external'          => 'accounting_costobject_l11n_language',
             'by'            => 'code2',
             'column'        => 'code2',
             'conditional'   => true,