phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '4f25af2d0e5239d87087f08dbeb70a9c' 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 ('4f25af2d0e5239d87087f08dbeb70a9c', -1, 1779159955, 1779159955, 'd849d956', 36, 0, 0)

Line : 187
File : sessions.php