mysql, select, distinct_key ?

select distinct g.id_galery_obfuscated,t.term from galery_1 g join tezaver t on g.id_tezaver = t.id_tezaver;
/* SQL Error (1062): Duplicate entry '-58b39bff758444bb81e60a64042d5a20-Goosefoot white' for key 'distinct_key' */

A to sploh kaj pomeni, a je krneki, google ne da nič od sebe ?

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