phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '02a8dbfd0035d1573c0cf53d3abdbea2' 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 ('02a8dbfd0035d1573c0cf53d3abdbea2', -1, 1770229994, 1770229994, 'd849d88f', -4, 0, 0)

Line : 187
File : sessions.php