phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'd5a728e2ff47d858d99fca4c570fdc40' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('d5a728e2ff47d858d99fca4c570fdc40', -1, 1770792888, 1770792888, 'd849d88f', -4, 0, 0)

Line : 187
File : sessions.php