wcs/qommon/static/js/qommon.forms.js

@@ -851,6 +851,8 @@ $(function() {
         data: form_data,
         headers: {'x-wcs-ajax-action': 'block-add-row'},
         success: function(result, text_status, jqXHR) {
+          var new_form_token = $(result).find('input[name="_form_id"]').val()
+          $('input[name="_form_id"]').val(new_form_token)
           const $new_block = $(result).find('[data-field-id="' + block_id + '"]');
           $block.replaceWith($new_block);
           const $new_blockrow = $new_block.find('.BlockSubWidget').last();