phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9d311bc28e67c596a5a75433c5fdc889' 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 ('9d311bc28e67c596a5a75433c5fdc889', -1, 1768998543, 1768998543, 'd849d8ad', 5, 0, 0)

Line : 187
File : sessions.php