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 ('8bef7b1aea62c1cfb295e10b3d16b8bc', -1, 1768266627, 1768266627, '54ccfc03', 2, 0, 0)

Line : 187
File : sessions.php