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 ('78b873a5a54ac7184d7924649f2df554', -1, 1730438949, 1730438949, '12e296f5', -1, 0, 0)

Line : 195
File : sessions.php