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 ('96f420065d9cafc433f97280c86bda9b', -1, 1713926989, 1713926989, '0a020003', 1, 0, 0)

Line : 187
File : sessions.php