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 ('c2789ec03e3a49266bfed37d10cf8a5b', -1, 1713559069, 1713559069, '0311ba87', -8, 0, 0)

Line : 187
File : sessions.php