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 ('b5172825bffe9083a0247614824a5b33', -1, 1714612157, 1714612157, '039010fe', -55, 0, 0)

Line : 187
File : sessions.php