phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '97acc16285fd0a8d8758da6888b1eebb' 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 ('97acc16285fd0a8d8758da6888b1eebb', -1, 1768227107, 1768227107, 'd849d8a2', -4, 0, 0)

Line : 187
File : sessions.php