phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '77ad8023b939e0bcf2729951926b4168' 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 ('77ad8023b939e0bcf2729951926b4168', -1, 1771619591, 1771619591, 'd849d890', 1, 0, 0)

Line : 187
File : sessions.php