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 ('9b5acb4f07dba7a812c4d12f670189a0', -1, 1762711772, 1762711772, 'd849d858', 2, 0, 0)

Line : 187
File : sessions.php