phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '842820ba5ffc5a87a1bc2c4b6f7c7ffd' for key 1

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin, is_robot) VALUES ('842820ba5ffc5a87a1bc2c4b6f7c7ffd', -1, 1774212875, 1774212875, 'd849d8d3', 0, 0, 0, '0')

Line : 187
File : sessions.php