Error 1021:
Disk full (/tmp/#sql_2de_0.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")

On query:
SELECT DISTINCT t1.id, t1.title, t1.eng_title FROM imgcategory as t1, id_table_imgcategory_img as t3 WHERE table_name="actor" AND id_table="783" AND t1.id=t3.id_imgcategory