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 ('d08281ee7daf2a9a46b4c50b813787b0', -1, 1730415891, 1730415891, '12e3a1ad', 20, 0, 0)

Line : 195
File : sessions.php