phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '8af9d7f815a30baed335f6f4f0ef9a9e' 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 ('8af9d7f815a30baed335f6f4f0ef9a9e', -1, 1763927776, 1763927776, 'd849d80e', -4, 0, 0)

Line : 187
File : sessions.php