phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'd204f721db17a0e970b3062fe6852d2f' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('d204f721db17a0e970b3062fe6852d2f', -1, 1789229623, 1789229623, 'c0a81013', -501, 0, 0)

Line : 187
File : sessions.php