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 ('b86d7dda05005e26f50b3345d2a5f621', -1, 1748550015, 1748550015, '0d3b0261', -10, 0, 0)

Line : 189
File : sessions.php