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) VALUES ('c2b6ba6fafb6e5e01861237dcff09072', -1, 1714305261, 1714305261, '0390fda1', 18, 0)

Line : 158
File : sessions.php