phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '5c9a4874bfd0c5995c2fc20a8d717f9e' 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 ('5c9a4874bfd0c5995c2fc20a8d717f9e', -1, 1767605304, 1767605304, 'd849d8a2', 1, 0, 0)

Line : 187
File : sessions.php