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 ('0540145929edf097c742a83d8eb4d8a0', -1, 1714607649, 1714607649, '12e10b62', -4, 0, 0)

Line : 187
File : sessions.php