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 ('8a0e52d3db9c8bc5247389d39efac2b5', -1, 1714144836, 1714144836, '0391112e', 4, 0, 0)

Line : 187
File : sessions.php