phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('eee1a1ccd4f14d6533cd86111dbd1a1e', -1, 1709027472, 1709027472, '2cd24d49', -4, 0, 0)

Line : 187
File : sessions.php