phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9f4c3578db7a6b25c41b32177aa97d7c' 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 ('9f4c3578db7a6b25c41b32177aa97d7c', -1, 1766235078, 1766235078, 'd849d820', -9, 0, 0)

Line : 187
File : sessions.php