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 ('eef3d53fad5df22bbacfbc2060a1a562', -1, 1730415634, 1730415634, '030ef709', 36, 0, 0)

Line : 195
File : sessions.php