phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '1cb510836c56b49891016a1972fd8b84' 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 ('1cb510836c56b49891016a1972fd8b84', -1, 1771561246, 1771561246, 'd849d890', 1, 0, 0)

Line : 187
File : sessions.php