phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '7c6d2b1da6eb9638c8cb57a68a69ef6c' 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 ('7c6d2b1da6eb9638c8cb57a68a69ef6c', -1, 1767146647, 1767146647, 'd849d803', 12, 0, 0)

Line : 187
File : sessions.php