phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'ca8c1869da1c9d19478218233b69d480' 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 ('ca8c1869da1c9d19478218233b69d480', -1, 1788977538, 1788977538, 'd849d8f0', 3, 0, 0)

Line : 187
File : sessions.php