phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a9f1233e6b77fbdbbcb6be1e209a37a0' 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 ('a9f1233e6b77fbdbbcb6be1e209a37a0', -1, 1759528746, 1759528746, 'd849d88b', 55, 0, 0)

Line : 187
File : sessions.php