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 ('0ed7492db9535d4e0beb0044e230068d', -1, 1771731954, 1771731954, '54ccfc03', 2, 0, 0)

Line : 187
File : sessions.php