phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9ba7878635b77b48ebe0d5a0a95765a3' 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 ('9ba7878635b77b48ebe0d5a0a95765a3', -1, 1762288910, 1762288910, 'd849d802', -9, 0, 0)

Line : 187
File : sessions.php