phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '6ade4fd05c141fe7717bacf6bbdaa636' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('6ade4fd05c141fe7717bacf6bbdaa636', -1, 1537827358, 1537827358, '36503a79', -4, 0, 0)

Line : 187
File : sessions.php