phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '4cd8d20d7ef31f009e38e7ed35e1e198' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('4cd8d20d7ef31f009e38e7ed35e1e198', -1, 1762257262, 1762257262, 'd849d8a1', -4, 0, 0)

Line : 187
File : sessions.php