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 ('44e31eb04e2479f01119fb8b5f478ec9', -1, 1713567809, 1713567809, '12dd8d2c', 4, 0, 0)

Line : 187
File : sessions.php