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 ('eb41db98d555b7ec4b8c0fc5ab90ebbb', -1, 1711678427, 1711678427, '22e62367', 7, 0, 0)

Line : 187
File : sessions.php