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 ('34acf58b7bff667bf807f9f9937b753c', -1, 1713438006, 1713438006, '03859c9c', -4, 0, 0)

Line : 187
File : sessions.php