phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'bb2fbcaf28864ad29c1c93245bbc4781' 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 ('bb2fbcaf28864ad29c1c93245bbc4781', -1, 1774003612, 1774003612, 'd849d815', -4, 0, 0)

Line : 187
File : sessions.php