phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '3f7de10853a1cd1791e6053a83b66930' 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 ('3f7de10853a1cd1791e6053a83b66930', -1, 1770575364, 1770575364, 'd849d88f', -4, 0, 0)

Line : 187
File : sessions.php