phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '40c9500a43e909e65e60f6849b6a10e5' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('40c9500a43e909e65e60f6849b6a10e5', -1, 1783939940, 1783939940, 'd849d84c', -4, 0, 0)

Line : 187
File : sessions.php