phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '21052a13ce54cabe63638fc72a8b6da3' 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 ('21052a13ce54cabe63638fc72a8b6da3', -1, 1767665524, 1767665524, 'd849d8a4', 35, 0, 0)

Line : 187
File : sessions.php