phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'a8b6bfd2a4c7ffd478abbb86c7bbfb19' 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 ('a8b6bfd2a4c7ffd478abbb86c7bbfb19', -1, 1711651809, 1711651809, '03ec916e', -9, 0, 0)

Line : 187
File : sessions.php