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 ('a1a4638b9a09f64a8f73d46017243923', -1, 1714040278, 1714040278, '12e2603d', -4, 0, 0)

Line : 187
File : sessions.php