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 ('b33bf2f2e1e0d59c00d1f7c240783f9e', -1, 1713514451, 1713514451, '0310515e', 5, 0, 0)

Line : 187
File : sessions.php