phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '121941954146cbf8275d4f1fccafebc5' 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 ('121941954146cbf8275d4f1fccafebc5', -1, 1770536402, 1770536402, 'd849d876', 1, 0, 0)

Line : 187
File : sessions.php