phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a878c343fda0d3fdb3747ec737a28a28' for key 'PRIMARY'

INSERT INTO sub_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('a878c343fda0d3fdb3747ec737a28a28', -1, 1757393616, 1757393616, 'd849d825', -7, 0, 0)

Line : 187
File : sessions.php