phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 2

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('0a6ac3d009b641e0d57592873c31cd13', -1, 1770752062, 1770752062, '54ccfc03', 2, 0, 0)

Line : 187
File : sessions.php