phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a9dd53da514442523dadc16aedfbc303' 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 ('a9dd53da514442523dadc16aedfbc303', -1, 1768176361, 1768176361, '0aff0001', 34, 0, 0)

Line : 199
File : sessions.php