phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '506fdf287c3c9c17f3d01eb1dc947892' for key 'phpbb_sessions.PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('506fdf287c3c9c17f3d01eb1dc947892', -1, 1769931241, 1769931241, 'd849d822', -4, 0, 0)

Line : 187
File : sessions.php