phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO cantautore_phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin, is_robot) VALUES ('0a3f2e75dce4e5d6d12b77e472578dc2', -1, 1711698091, 1711698091, '36ac5f6a', 16, 0, '0', '0')

Line : 175
File : sessions.php