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 ('ccdb9b2e36d9f80e16cac900c29a1a26', -1, 1714064609, 1714064609, '12df0035', -11, 0, 0)

Line : 187
File : sessions.php