phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a1d97a0476ab1ca00c5e6df635f4c09e' 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 ('a1d97a0476ab1ca00c5e6df635f4c09e', -1, 1766733134, 1766733134, 'd849d8a2', 1, 0, 0)

Line : 187
File : sessions.php