Hi,
you used a new tag here:
wikimaginot = https://wikimaginot.eu/V70_construction_detail.php?id=10461

It would be better to have it in a common 'url' or 'ref' tag, e.g. 

ref:wikimaginot = 10461

url = https://wikimaginot.eu/V70_construction_detail.php?id=10461
