phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6bf27f1d50b0480c09900795e8c8d3ab' 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 ('6bf27f1d50b0480c09900795e8c8d3ab', -1, 1778728106, 1778728106, 'd849d93d', -4, 0, 0)

Line : 187
File : sessions.php