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 ('addf5c9c809a79e286f3f435ce64df5b', -1, 1714882059, 1714882059, '127428b1', -4, 0, 0)

Line : 187
File : sessions.php