phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '8b6cac289228d94957ac9dabbfff0f09' for key 1

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('8b6cac289228d94957ac9dabbfff0f09', -1, 1766503520, 1766503520, 'd849d873', 0, 0, 0)

Line : 187
File : sessions.php