phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '4878e2f88d36d1aaa4ec10a2eaa335c8' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('4878e2f88d36d1aaa4ec10a2eaa335c8', -1, 1772158846, 1772158846, 'd849d834', -9, 0)

Line : 180
File : /www/includes/sessions.php