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 ('635fe06d6eb2057ccda2982e8d02adab', -1, 1713610537, 1713610537, '038593fc', -10, 0, 0)

Line : 187
File : sessions.php