phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'b09e98b8fa2157cc6f037b41a0a678cc' 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 ('b09e98b8fa2157cc6f037b41a0a678cc', -1, 1776600375, 1776600375, 'd849d8ef', -9, 0, 0)

Line : 187
File : sessions.php