phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '621c21e7014d6f73395de8fba782d531' 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 ('621c21e7014d6f73395de8fba782d531', -1, 1762138227, 1762138227, 'd849d8a1', -4, 0, 0)

Line : 187
File : sessions.php