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 ('81006c5e34dc1264269c337acfe09586', -1, 1730417845, 1730417845, '12d85fc5', 18, 0, 0)

Line : 195
File : sessions.php