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 ('4308e2080f67fe0b53450e8d2072aa70', -1, 1713603302, 1713603302, '03856cf1', 0, 0, 0)

Line : 187
File : sessions.php