Error "step6_attachments: ["This value is not valid."]" Add new file and save product

[gusman126]

Problem adding a file to a product.
The following error is displayed

Error "step6_attachments: ["This value is not valid."]" 

It has worked correctly, until it has been seen that it has stopped working, total files +2500

 

[devHeaven]

/[admin]/themes/default/js/bundle/product/form.js:1268

replace:
    <input type="checkbox" name="form[step6][attachments][]" value="${response.id}" checked="checked"> ${response.real_name}
to:
    <input type="checkbox" name="form[step6][attachments][]" value="${response.id-1}" checked="checked"> ${response.real_name}