phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '777e5eb9e7131c9ad45302f51f097e80' 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 ('777e5eb9e7131c9ad45302f51f097e80', -1, 1771020837, 1771020837, 'd849d88a', -4, 0, 0)

Line : 187
File : sessions.php