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 ('320c8eafc5896c1b070482ba508d2531', -1, 1714024233, 1714024233, '038accd0', -4, 0, 0)

Line : 187
File : sessions.php