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 ('a5c10efe6b109a08955c0f5c0030b504', -1, 1728943040, 1728943040, '54ccfc03', -10, 0, 0)

Line : 187
File : sessions.php