phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9851b53be28efa06d34f3dc3c4111c14' 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 ('9851b53be28efa06d34f3dc3c4111c14', -1, 1768972084, 1768972084, 'd849d869', 31, 0, 0)

Line : 187
File : sessions.php