phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '57b9ffb8215a86307d41b23b570acdc5' 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 ('57b9ffb8215a86307d41b23b570acdc5', -1, 1770345464, 1770345464, 'd849d83c', 3, 0, 0)

Line : 187
File : sessions.php