phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '063d0b4d7fc0d19e50e248c5c35a353d' 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 ('063d0b4d7fc0d19e50e248c5c35a353d', -1, 1770172174, 1770172174, 'd849d8a2', -4, 0, 0)

Line : 187
File : sessions.php