phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '51fd96964837915fb8dc5aab7ce9c786' 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 ('51fd96964837915fb8dc5aab7ce9c786', -1, 1757124292, 1757124292, 'd849d8a0', 9, 0, 0)

Line : 187
File : sessions.php