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 ('5d88c63e6a497459bbf3093f1ac551af', -1, 1776816671, 1776816671, '54ccfc03', 2, 0, 0)

Line : 187
File : sessions.php