phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb2_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('9fc8d376e9bdb076f28bd7dbf1f45af6', -1, 1702263143, 1702263143, '12ce0c9d', 9, 0, 0)

Line : 187
File : sessions.php