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 ('5ff95420b679731f5220277d0ff878a0', -1, 1713536906, 1713536906, '0311b85a', -1, 0, 0)

Line : 187
File : sessions.php