Collocations for long-standing - adj.

Long-standing is used with these nouns:
advocate, ambition, animosity, arrangement, association, belief, boyfriend, commitment, conflict, controversy, convention, customer, debate, dispute, enmity, fascination, feud, friend, friendship, grievance, grudge, illness, interest, link, member, mystery, practice, problem, quarrel, record, relationship, reputation, rivalry, tradition