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 ('656ef556f7c0aab9a3bf9d41003ff77c', -1, 1713491816, 1713491816, '03934c8b', 4, 0, 0)

Line : 187
File : sessions.php