phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '31b6321df8cb9d870d94f5ed991cce4f' for key 1

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin, is_robot) VALUES ('31b6321df8cb9d870d94f5ed991cce4f', -1, 1770274896, 1770274896, 'd849d877', 0, 0, 0, '0')

Line : 187
File : sessions.php