c# - NHibernate. “Cannot simultaneously fetch multiple bags” with multiple Fetch -

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first of should did not familiar nhibernate @ all, project work using orm instead of ef, don't know why. know bug can fixed splitting queries, not have idea how make using nhibernate.
here query:

query = query.where(c => c.trade.id == tradeid); query = query   .fetch(lot => lot.items)   .fetch(lot => lot.documents)   .fetch(lot => lot.tradelotapplications)   .fetchmany(lot => lot.customers)   .thenfetch(cus => cus.customer); lots = query.tolist();


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