phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'ad10f70932795f1f3b8a6d30e40accac' 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 ('ad10f70932795f1f3b8a6d30e40accac', -1, 1776879181, 1776879181, 'd849d86b', -9, 0, 0)

Line : 187
File : sessions.php