phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a4b9ca98efa17fb81a13cfa1f9f2571a' 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, priv_session_id) VALUES ('a4b9ca98efa17fb81a13cfa1f9f2571a', -1, 1714139939, 1714139939, 'ac450771', -4, 0, 0, 'a311d3f1035ee3b5dd005088c90c3728')

Line : 187
File : sessions.php