# check for missing rels 
SELECT p.id, p.name, rsp.source_id, p.url
FROM aps_products p 
left join aps_rel_source_product rsp ON p.id = rsp.product_id
WHERE rsp.source_id IS NULL
LIMIT 50

# insert rels 
# CHANGE: source_id and url like
INSERT INTO aps_rel_source_product ( source_id, product_id )
SELECT '1', p.id
FROM aps_products p 
left join aps_rel_source_product rsp ON p.id = rsp.product_id
WHERE  rsp.source_id IS NULL and p.url like '%www.pacopetshop.it%'