phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'f97c7f9084548b6dee391ae597b78b7b' 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 ('f97c7f9084548b6dee391ae597b78b7b', -1, 1762296910, 1762296910, 'd849d8b0', -9, 0, 0)

Line : 187
File : sessions.php