phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '4ac8a5b3860c82c92a2d02b3ea265b16' 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 ('4ac8a5b3860c82c92a2d02b3ea265b16', -1, 1764742634, 1764742634, 'd849d8de', -4, 0, 0)

Line : 187
File : sessions.php