diff --git a/Core/Base/AjaxForms/PurchasesHeaderHTML.php b/Core/Base/AjaxForms/PurchasesHeaderHTML.php
index e54da45094..8f584118b9 100644
--- a/Core/Base/AjaxForms/PurchasesHeaderHTML.php
+++ b/Core/Base/AjaxForms/PurchasesHeaderHTML.php
@@ -156,14 +156,14 @@ private static function codproveedor(Translator $i18n, PurchaseDocument $model):
         return $html;
     }
 
-    private static function detail(Translator $i18n, PurchaseDocument $model, bool $force = false): string
+    private static function detail(Translator $i18n, PurchaseDocument $model, bool $new = false): string
     {
-        if (empty($model->primaryColumnValue()) && $force === false) {
-            // necesitamos el modal para tener los inputs en el form
-            return self::detailModal($i18n, $model);
+        if (empty($model->primaryColumnValue()) && $new === false) {
+            // si el modelo es nuevo, ya hemos pintado el modal de detalle
+            return '';
         }
 
-        $css = $force ? 'col-sm-auto' : 'col-sm';
+        $css = $new ? 'col-sm-auto' : 'col-sm';
         return '<div class="' . $css . '">'
             . '<div class="form-group">'
             . '<button class="btn btn-outline-secondary" type="button" data-toggle="modal" data-target="#headerModal">'
diff --git a/Core/Base/AjaxForms/SalesHeaderHTML.php b/Core/Base/AjaxForms/SalesHeaderHTML.php
index 7d530c1c20..884a21d6c5 100644
--- a/Core/Base/AjaxForms/SalesHeaderHTML.php
+++ b/Core/Base/AjaxForms/SalesHeaderHTML.php
@@ -243,14 +243,14 @@ private static function codtrans(Translator $i18n, SalesDocument $model): string
             . '</div>';
     }
 
-    private static function detail(Translator $i18n, SalesDocument $model, bool $force = false): string
+    private static function detail(Translator $i18n, SalesDocument $model, bool $new = false): string
     {
-        if (empty($model->primaryColumnValue()) && $force === false) {
-            // necesitamos el modal para tener los inputs en el form
-            return self::detailModal($i18n, $model);
+        if (empty($model->primaryColumnValue()) && $new === false) {
+            // si el modelo es nuevo, ya hemos pintado el modal de detalle
+            return '';
         }
 
-        $css = $force ? 'col-sm-auto' : 'col-sm';
+        $css = $new ? 'col-sm-auto' : 'col-sm';
         return '<div class="' . $css . '">'
             . '<div class="form-group">'
             . '<button class="btn btn-outline-secondary" type="button" data-toggle="modal" data-target="#headerModal">'