phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'acc19ff0b43e415b0bd0635372c1ee19' 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 ('acc19ff0b43e415b0bd0635372c1ee19', -1, 1770463197, 1770463197, 'd849d89c', -9, 0, 0)

Line : 187
File : sessions.php