phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '257166134c314f86a6cafee1640f0ad6' 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 ('257166134c314f86a6cafee1640f0ad6', -1, 1774770013, 1774770013, 'd849d8d0', -19, 0, 0)

Line : 187
File : sessions.php