phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'aca36213991f22c5e335a7e81f8f396d' 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 ('aca36213991f22c5e335a7e81f8f396d', -1, 1770849703, 1770849703, 'd849d801', -4, 0, 0)

Line : 187
File : sessions.php