phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '7881971a6d65c3300f1c6f7e2630da66' 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 ('7881971a6d65c3300f1c6f7e2630da66', -1, 1757886105, 1757886105, 'd849d809', 2, 0, 0)

Line : 187
File : sessions.php