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 ('702dc3f260d7a0d1f3a9c1d482bf166f', -1, 1714018115, 1714018115, '12bfaea8', -8, 0, 0)

Line : 187
File : sessions.php