Problema multiple JOIN

[ratamaster]

Hola gente!
Estoy haciendo una query que me da un error:

Syntax error or access violation, message from server: "Not unique table/alias: 'ventypecat'"


SELECT vendors.VenNam, vendors.VenAddress, vendors.VenOwner, vendors.VenPhone,
vendors.VenFax, vendors.VenAcc,
group_concat(DISTINCT countries.CtryNam),
group_concat(DISTINCT ventypecat.VenCatId)
FROM vendors, countries, ventypecat
LEFT JOIN ventypecat ON vendors.VenId = ventypecat.VenId
AND ventypecat.VenTypeId=1
AND vendors.CtryId = countries.CtryId
GROUP BY vendors.VenNam, countries.CtryNam

El problema aparece por causa del LEFT JOIN