Server error

When submitting a new open problem there happened a server error:

Warning: Duplicate entry '3017-0' for key 1 query: INSERT INTO node_data_field_related (field_related_nid, vid, nid, delta) VALUES (0, 3017, 1849, 0) in /Users/dm/Sites/ on line 121

Warning: Cannot modify header information - headers already sent by (output started at /Users/dm/Sites/ in /Users/dm/Sites/ on line 269


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