phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'b4d97763960f6fbd10540e7eadea1dc5' 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 ('b4d97763960f6fbd10540e7eadea1dc5', -1, 1770257883, 1770257883, 'd849d877', 0, 0, 0, '0')

Line : 187
File : sessions.php